Engineering The Magnetoelectric Coupling In Complex Oxides Heterostructures

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Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures

Author : Di Yi
Publisher :
ISBN 13 :
Total Pages : 130 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures by : Di Yi

Download or read book Engineering the Magnetoelectric Coupling in Complex Oxides Heterostructures written by Di Yi and published by . This book was released on 2015 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiferroic magnetoelectric (ME) materials, which simultaneously show ferroelectricity and magnetic ordering, have attracted a huge scientific attention due to both the intriguing fundamental importance and the great technological potential, as a result of the coupling between the dual ferroic orderings. However there are only a few single-phase multiferroic materials in nature and the performance is limited by the low ordering temperature, the small polarization/magnetization or the weak coupling efficiency. Another promising pathway to engineer ME coupling is through designing heterostructures. The current studies of ME coupling (electric field control of magnetism) in heterostructures can be divided into 3 routes: (1) Using piezoelectric effects to change the strain (lattice); (2) Using ferroelectric polarization to tune the carriers (charge); (3) Using multiferroic materials to manipulate the moments by magnetic coupling (spin). Previous studies of an all-oxide model heterostructure system that consists of the ferromagnet La0.7Sr0.3MnO3 (LSMO) and the BiFeO3 (BFO) reveals an interesting charge and spin interactions at the interface. Following the same route, the first part of the dissertation focuses on two different pathways to improve the ME coupling in manganite/BFO model system. Chapter 3 demonstrates that the ME coupling in LSMO/BFO is dramatically different by changing the atomic stack-ing sequence at the interface. In chapter 4, another model system La0.5Ca0.5MnO3 (LCMO), which is at the ferromagnetic/antiferromagnetic phase boundary, is studied instead of LSMO to explore the limit within this route. The results complementarily suggest the importance of a more comprehensive design rule at the atomic scale in order to achieve a better ME coupling efficiency. Furthermore, although the coupling between the lattice, charge and spin has been intensively studied in terms of ME coupling, the orbital degree of freedom has been neglected so far. In principle, orbital is strongly coupled to lattice. Therefore a large ME coupling could be expected if a strong spin-orbit interaction could be established. The second part of the dissertation concentrates on pursuing this new ideal through two different pathways. Chapter 5 presents a systematic study of the in-situ strain effect on the magnetic and orbital orderings of a model system Nd0.5Sr0.5MnO3. The results demonstrate the close correlation between the orbital ordering parameter and the strain. However the magnetic ordering parameter is less sensitive to strain in this system. With the implication from chapter 5, 5d transition metal oxide SrIrO3(SIO), which hosts a strong intrinsic spin-orbit coupling due to the large atomic number, is studied in chapter 6. Superlattice LSMO/SIO shows an interesting novel magnetic state with a large orbital momentum in the nominally paramagnetic SIO, which is likely to be a very promising candidate to engineer the ME coupling at the interface. In summary, our studies on engineering the ME effects in heterostructures have revealed two key implications: 1. in the traditional routes that have been extensively studied, further improvements are possible by carefully engineering the interface; 2. the coupling between spin and orbital degrees of freedom is likely to be another promising route to investigate the ME coupling in heterostructures.

Magnetoelectric Coupling in Membrane Thin-film Heterostructures

Author : Shane Lindemann
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (138 download)

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Book Synopsis Magnetoelectric Coupling in Membrane Thin-film Heterostructures by : Shane Lindemann

Download or read book Magnetoelectric Coupling in Membrane Thin-film Heterostructures written by Shane Lindemann and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strain-coupling in ferromagnetic (FM) / ferroelectric (FE) multiferroic heterostructures shows promise to become the next generation of low-power, ultra-fast memory storage devices in addition to opening new avenues of fundamental scientific research. The relaxor ferroelectric (1-x)Pb(Mg1/3Nb2/3)O3-(x)PbTiO3 (PMN-PT) is an ideal candidate as the FE layer due to its giant piezoelectricity. By coupling with a FM overlayer, an applied bias across the PMN-PT results in the generation of large piezostrains which are transferred into the FM layer to alter the FM's magnetic anisotropy, resulting in a piezo-driven magnetoelectric (ME) effect. This has been demonstrated using bulk single crystals of PMN-PT coupled with FM overlayers, but the bulk dimensions required application of over 100V applied bias. For low power coupling to be achieved, thin films of PMN-PT must be used.Strain-mediated ME coupling in thin film heterostructures has proven to be difficult due to two major challenges: 1) Elastic clamping by the substrate acts to eliminate giant piezoelectricity in PMN-PT thin films. 2) The films must exhibit anisotropic in-plane strain to alter in-plane magnetic anisotropy of a FM overlayer. Our approach to overcome these challenges is through growth of epitaxial thin films of PMN-PT followed by release of the films from their substrate to make ME membranes. After release from the substrate, we observe a recovery of giant piezoelectricity in PMN-PT membranes and demonstrate successful ME coupling with Ni overlayers. We found that for (001) oriented PMN-PT membranes, the nominally isotropic in-plane strains are transformed into anisotropic in-plane strains through Piezotensor Engineering, i.e. an interaction between biased and unbiased regions dictated by the electrode geometry. In (011) PMN-PT membranes, intrinsic anisotropic in-plane strains result in a 90-degree rotation of Ni's in-plane anisotropy with only 3V bias across the PMN-PT, demonstrating that PMN-PT membranes can achieve low power ME coupling. The membrane assembled heterostructures will lead to novel strain-mediated devices through heterogeneous integration. Individual membranes of various materials, including complex oxides, III-V's, and 2-Dimensional (2D) materials, can be stacked together with the PMN-PT membranes providing an exciting pathway to study an extraordinary range of piezo-driven phenomena and functionalities.

Multifunctional Oxide Heterostructures

Author : Evgeny Y. Tsymbal
Publisher : Oxford University Press
ISBN 13 : 0199584125
Total Pages : 429 pages
Book Rating : 4.1/5 (995 download)

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Book Synopsis Multifunctional Oxide Heterostructures by : Evgeny Y. Tsymbal

Download or read book Multifunctional Oxide Heterostructures written by Evgeny Y. Tsymbal and published by Oxford University Press. This book was released on 2012-08-30 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume explores the rapidly developing field of oxide thin-films and heterostructures, which exhibit unusual physical properties interesting from the fundamental point of view and for device application. The chapters discuss topics that represent some of the key innovations in the field over recent years.

Magnetoelectric Coupling in Multifunctional Nanostructured Complex Oxide Thin Films

Author : Steven Peter Crane
Publisher :
ISBN 13 :
Total Pages : 372 pages
Book Rating : 4.:/5 (35 download)

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Book Synopsis Magnetoelectric Coupling in Multifunctional Nanostructured Complex Oxide Thin Films by : Steven Peter Crane

Download or read book Magnetoelectric Coupling in Multifunctional Nanostructured Complex Oxide Thin Films written by Steven Peter Crane and published by . This book was released on 2009 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Multifunctional Oxide Heterostructures

Author : Evgeny Y. Tsymbal
Publisher : OUP Oxford
ISBN 13 : 0191642223
Total Pages : 416 pages
Book Rating : 4.1/5 (916 download)

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Book Synopsis Multifunctional Oxide Heterostructures by : Evgeny Y. Tsymbal

Download or read book Multifunctional Oxide Heterostructures written by Evgeny Y. Tsymbal and published by OUP Oxford. This book was released on 2012-08-30 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the rapidly developing field of oxide thin-films and heterostructures. Oxide materials combined with atomic-scale precision in a heterostructure exhibit an abundance of macroscopic physical properties involving the strong coupling between the electronic, spin, and structural degrees of freedom, and the interplay between magnetism, ferroelectricity, and conductivity. Recent advances in thin-film deposition and characterization techniques made possible the experimental realization of such oxide heterostructures, promising novel functionalities and device concepts. The book consists of chapters on some of the key innovations in the field over recent years, including strongly correlated oxide heterostructures, magnetoelectric coupling and multiferroic materials, thermoelectric phenomena, and two-dimensional electron gases at oxide interfaces. The book covers the core principles, describes experimental approaches to fabricate and characterize oxide heterostructures, demonstrates new functional properties of these materials, and provides an overview of novel applications.

'Soft Electronic Matter', Magnetoelectric Coupling, and Multiferroism in Complex Oxides

Author : Patrick R. Mickel
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (779 download)

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Book Synopsis 'Soft Electronic Matter', Magnetoelectric Coupling, and Multiferroism in Complex Oxides by : Patrick R. Mickel

Download or read book 'Soft Electronic Matter', Magnetoelectric Coupling, and Multiferroism in Complex Oxides written by Patrick R. Mickel and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: This thesis has focused on the electronic and magnetic properties of thin-film oxide crystals. Oxides are home to some of the richest physics in condensed matter, producing complex features in response to changes in temperature, electric/magnetic fields, and strain. Three of these features have gained particular prominence, and are among the most active research topics today: phase separation, magnetoelectric coupling, and multiferroism.

Integrated Multiferroic Heterostructures and Applications

Author : Ming Liu
Publisher : John Wiley & Sons
ISBN 13 : 3527341773
Total Pages : 258 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Integrated Multiferroic Heterostructures and Applications by : Ming Liu

Download or read book Integrated Multiferroic Heterostructures and Applications written by Ming Liu and published by John Wiley & Sons. This book was released on 2019-08-05 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by well-known experts in the field, this first systematic overview of multiferroic heterostructures summarizes the latest developments, first presenting the fundamental mechanisms, including multiferroic materials synthesis, structures and mechanisms, before going on to look at device applications. The resulting text offers insight and understanding for scientists and students new to this area.

Emergent Phenomena at Complex Oxide Interfaces

Author : Pu Yu
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (18 download)

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Book Synopsis Emergent Phenomena at Complex Oxide Interfaces by : Pu Yu

Download or read book Emergent Phenomena at Complex Oxide Interfaces written by Pu Yu and published by . This book was released on 2011 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Novel phenomena and functionalities at epitaxial complex oxide heterostructures have been attracting huge scientific attention because of the intriguing fundamental physics as well as potential for technological applications that they embody. Essentially, charge and spin reconstruction at the interface can lead to exotic properties, which are completely different from those inherent to the individual materials, for example, a conductive interface between two insulating materials and interface ferromagnetism in the proximity of an antiferromagnet. The interplay between charge and spin degrees of freedom can be particularly intriguing, leading to a fascinating realm, called multiferroic. In this dissertation, a systematic study is performed on the electronic (charge) and magnetic (spin) interaction/reconstruction across the interface of an all-oxide model heterostructure system consisting of the ferromagnet (FM) La$_{0.7}$Sr$_{0.3}$MnO$_3$ (LSMO) and the multiferroic (ferroelectric and antiferromagnetic) BiFeO$_3$ (BFO). The study demonstrates two pathways of using these exotic interfacial properties to control bulk properties, both the ferroelectricity in BFO and ferromagnetism in LSMO. The journey starts with the growth of high-quality BFO/LSMO heterostructures with unit-cell precision control using reflection high-energy electron diffraction combined with pulsed-laser deposition, providing an important platform for the investigation of electronic and magnetic coupling phenomena across the interface. First, we have observed a novel consequence of the interface electronic interaction due to the so-called ``polar discontinuity'', namely, a built-in electrostatic potential accumulates across the heterointerface, and provides deterministic control of ferroelectric polarization states in thin films. This observation suggests a strong, delocalized effect with important implications for future electronics based on such materials. Secondly, we have revealed a strong magnetic coupling at this interface, manifested in the form of an enhanced coercive field as well as a significant exchange-bias coupling. Based on our x-ray magnetic circular dichroism studies, the origin of the exchange-bias coupling is attributed to a novel ferromagnetic state formed in the antiferromagnetic BFO sublattice at the interface with LSMO. Thirdly, using a field effect geometry, we have proposed a pathway to use an electric field to control the magnetism in LSMO in which the ground state of the interfacial ferromagnetic state is strongly correlated with the ferroelectric polarization. Magnetotransport measurements clearly demonstrate a reversible switch/control between two distinct exchange-bias states by isothermally switching the ferroelectric polarization of BFO. This is an important step towards controlling magnetization with the electric field, which may enable a new class of electrically controllable spintronic devices and provide a new basis for producing electrically controllable spin-polarized currents. Finally, combining experimental results with first-principle and phenomenological model calculations, a microscopic model has been proposed to understand the underlying physics of the magnetoelectric coupling, providing further insights on achieving the electric-field control of magnetism. In summary, our studies on the interfacial electronic and magnetic properties at BFO/LSMO heterointerfaces have revealed a strong interplay between the charge, spin, orbital and lattice degrees of freedom at the interface, which will have important implications for a new pathway to use the interface properties to control bulk functionalities (ferroelectric polarization and ferromagnetic magnetization in this study). Such couplings at the interface may be extended to other oxides and will bring into play remarkable physical concepts to this developing field of complex oxide heterointerfaces.

Ferroelectric Domain Walls

Author : Jill Guyonnet
Publisher : Springer Science & Business Media
ISBN 13 : 3319057502
Total Pages : 167 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Ferroelectric Domain Walls by : Jill Guyonnet

Download or read book Ferroelectric Domain Walls written by Jill Guyonnet and published by Springer Science & Business Media. This book was released on 2014-04-08 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using the nano metric resolution of atomic force microscopy techniques, this work explores the rich fundamental physics and novel functionalities of domain walls in ferroelectric materials, the nano scale interfaces separating regions of differently oriented spontaneous polarization. Due to the local symmetry-breaking caused by the change in polarization, domain walls are found to possess an unexpected lateral piezoelectric response, even when this is symmetry-forbidden in the parent material. This has interesting potential applications in electromechanical devices based on ferroelectric domain patterning. Moreover, electrical conduction is shown to arise at domain walls in otherwise insulating lead zirconate titanate, the first such observation outside of multiferroic bismuth ferrite, due to the tendency of the walls to localize defects. The role of defects is then explored in the theoretical framework of disordered elastic interfaces possessing a characteristic roughness scaling and complex dynamic response. It is shown that the heterogeneous disorder landscape in ferroelectric thin films leads to a breakdown of the usual self-affine roughness, possibly related to strong pinning at individual defects. Finally, the roles of varying environmental conditions and defect densities in domain switching are explored and shown to be adequately modelled as a competition between screening effects and pinning.

Ferroic Materials-Based Technologies

Author : Inamuddin
Publisher : John Wiley & Sons
ISBN 13 : 1394238177
Total Pages : 356 pages
Book Rating : 4.3/5 (942 download)

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Book Synopsis Ferroic Materials-Based Technologies by : Inamuddin

Download or read book Ferroic Materials-Based Technologies written by Inamuddin and published by John Wiley & Sons. This book was released on 2024-05-29 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: FERROIC MATERIALS-BASED TECHNOLOGIES The book addresses the prospective, relevant, and original research developments in the ferroelectric, magnetic, and multiferroic fields. Ferroic materials have sparked widespread attention because they represent a broad spectrum of elementary physics and are employed in a plethora of fields, including flexible memory, enormous energy harvesting/storage, spintronic functionalities, spin caloritronics, and a large range of other multi-functional devices. With the application of new ferroic materials, strong room-temperature ferroelectricity with high saturation polarization may be established in ferroelectric materials, and magnetism with significant magnetization can be accomplished in magnetic materials. Furthermore, magnetoelectric interaction between ferroelectric and magnetic orderings is high in multiferroic materials, which could enable a wide range of innovative devices. Magnetic, ferroelectric, and multiferroic 2D materials with ultrathin characteristics above ambient temperature are often expected to enable future miniaturization of electronics beyond Moore’s law for energy-efficient nanodevices. This book addresses the prospective, relevant, and original research developments in the ferroelectric, magnetic, and multiferroic fields. Audience The book will interest materials scientists, physicists, and engineers working in ferroic and multiferroic materials.

Magnetoelectric Composites

Author : Mirza I. Bichurin
Publisher : CRC Press
ISBN 13 : 0429949618
Total Pages : 280 pages
Book Rating : 4.4/5 (299 download)

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Book Synopsis Magnetoelectric Composites by : Mirza I. Bichurin

Download or read book Magnetoelectric Composites written by Mirza I. Bichurin and published by CRC Press. This book was released on 2019-02-22 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to modeling and application of magnetoelectric (ME) effects in layered and bulk composites based on magnetostrictive and piezoelectric materials. Currently, numerous theoretical and experimental studies on ME composites are available but few on the development and research of instruments based on them. So far, only investigation of ME magnetic field sensors has been cited in the existing literature. However, these studies have finally resulted in the creation of low-frequency ME magnetic field sensors with parameters substantially exceeding the characteristics of Hall sensors. The book presents the authors’ many years of experience gained in ME composites and through creation of device models based on their studies. It describes low-frequency ME devices, such as current and position sensors and energy harvesters, and microwave ME devices, such as antennas, attenuators, filters, gyrators, and phase shifters.

The Magnetoelectric Effect in Oxide Thin Film Heterostructures

Author : Julian Irwin
Publisher :
ISBN 13 :
Total Pages : 123 pages
Book Rating : 4.:/5 (114 download)

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Book Synopsis The Magnetoelectric Effect in Oxide Thin Film Heterostructures by : Julian Irwin

Download or read book The Magnetoelectric Effect in Oxide Thin Film Heterostructures written by Julian Irwin and published by . This book was released on 2020 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetoelectric materials are poised to make a technological impact in a world where improving efficiency and performance of electronics is increasingly important. That magnetoelectric effect is coupling of electrical and magnetic orderings provided by a single material or several coupled materials. This dissertation explores magnetoelectric effects in two different oxide thin film heterostructures. First, the intrinsic magnetoelectric effect in room temperature multiferroic bismuth ferrite (BiFeO[subscript 3]), and second the extrinsic magnetoelectric effect in strain-coupled composite membranes. Bismuth ferrite is one of the few intrinsically magnetoelectric materials with possible technological importance, as it is ferroelectric and antiferromagnetic at room temperature. Exploiting multiferroic BiFeO[subscript 3] thin films in spintronic devices requires deterministic control of both internal magnetoelectric coupling in BiFeO[subscript 3], as well as exchange coupling of its antiferromagnetic order to a ferromagnetic overlayer. We present an approach using a monodomain magnetoelectric state with single-step switching. Here we demonstrate room temperature, deterministic and robust, exchange coupling between monodomain BiFeO[subscript 3] films and a Co overlayer that is intrinsic (i.e., not dependent on domain walls). Direct coupling between BiFeO[subscript 3] antiferromagnetic order and Co magnetization is observed, with ~ 90[degrees] in-plane Co moment rotation upon single-step switching that is reproducible for hundreds of cycles. Magnetoelectricity in piezoelectric / ferromagnetic thin-film heterostructures comes from piezoelectric strain combined with magnetostriction. In-plane magnetization rotation with an electric field across the film thickness has been challenging due to the large reduction of in-plane piezoelectric strain by substrate clamping, and in two-terminal devices, the requirement of anisotropic in-plane strain. Here we show that these limitations can be overcome two different ways in thin films. First by designing the piezoelectric strain tensor using the boundary interaction between biased and unbiased piezoelectric in (001)-oriented [Pb(Mg[subscript 1/3]Nb[subscript 2/3])O[subscript 3]][subscript 0.7]-[PbTiO[subscript 3]][subscript 0.3] (PMN-PT) membranes with ferromagnetic Ni overlayers, and second by fabricating (011)-oriented Ni/PMN-PT membranes capable of generating anisotropic strain from the symmetry of the crystal alone. We demonstrate several magnetoelectric effects including 90[degrees] rotation of in-plane magnetic anisotropy with a perpendicular electric field. Further optimization of magnetoelectric PMN-PT membrane heterostructures is expected to allow for magnetization rotation at even lower voltages and for nonvolatile magnetoelectric switching.

Magnetoelectric Coupling in Cobalt-based Tellurium (VI) Oxides with Complex Spin Structures

Author : Stanislav Podchezertsev
Publisher :
ISBN 13 :
Total Pages : 183 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Magnetoelectric Coupling in Cobalt-based Tellurium (VI) Oxides with Complex Spin Structures by : Stanislav Podchezertsev

Download or read book Magnetoelectric Coupling in Cobalt-based Tellurium (VI) Oxides with Complex Spin Structures written by Stanislav Podchezertsev and published by . This book was released on 2021 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Electronic and Optical Properties of Low Dimensional Metal-oxide Heterostructures

Author : Wente Li
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

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Book Synopsis The Electronic and Optical Properties of Low Dimensional Metal-oxide Heterostructures by : Wente Li

Download or read book The Electronic and Optical Properties of Low Dimensional Metal-oxide Heterostructures written by Wente Li and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functional metal-oxide materials exhibit many intriguing phenomena and attract the intensive research in condensed matter physics as well as materials science. Furthermore, the metal-oxide-based heterostructures demonstrate unusual low-dimensional effects due the symmetry breaking at the interface. I have studied several low dimensional heterostructures from the theoretical and computational perspectives. I have developed a multiscale simulation framework, based on density functional theory that covers the microscopic (~ 10−9 m), mesoscopic (~ 10−8 m) and macroscopic (~ 10−7 m) length scale. The first heterointerface I discuss is Si/EuO. Using density functional theory, I demonstrate how the interfacial oxidation influences the band alignment between the Si substrate and EuO, which is essential for the EuO applications in spintronic devices. The second system is the two-dimension electron gas at the oxygen deficient SrTiO3/EuO interface in the BaTiO3/SrTiO3/EuO heterostructure. I demonstrate that the spontaneous polarization in BaTiO3 can influence the intrinsic electric field across SrTiO3/EuO and control the location of the two-dimensional electron gas in either SrTiO3 side or EuO side. The switchable functionality due to the presence of BaTiO3 offers a promising way to control spin polarized carriers in spintronic devices. Next, I focus on the magnetoelectric effect at the BaTiO3/Ni interface and demonstrate that compared to bulk multiferroic materials, artificially engineered interface structures have much larger magnetoelectric coupling coefficients due to the symmetry breaking at the interface. The fourth system I study is the BaSnO3-based quantum well. By utilizing the intersubband transitions, the BaSnO3-based quantum well structure has high nonlinear optical susceptibility as well as broad optical spectral range, from THz to near visible light region, which has promising applications as nonlinear light source in photonic integrated circuit. The fifth system discussed in this thesis is the epitaxial BaTiO3 films deposited on different substrates. Compared with the bulk material, the behavior of thin films of BaTiO3 is different due to the complicated boundary conditions. To describe a thin film, I use phase field simulations implemented with a finite element method. The simulations are able to reveal the complex domain morphology

Oxide Spintronics

Author : Tamalika Banerjee
Publisher : CRC Press
ISBN 13 : 042988690X
Total Pages : 306 pages
Book Rating : 4.4/5 (298 download)

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Book Synopsis Oxide Spintronics by : Tamalika Banerjee

Download or read book Oxide Spintronics written by Tamalika Banerjee and published by CRC Press. This book was released on 2019-05-28 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide materials have been used in mainstream semiconductor technology for several decades and have served as important components, such as gate insulators or capacitors, in integrated circuits. However, in recent decades, this material class has emerged in its own right as a potential contender for alternative technologies, generally designated as ‘beyond Moore’. The 2004 discovery by Ohtomo and Hwang was a global trendsetter in this context. It involved observing a two-dimensional, high-mobility electron gas at the heterointerface between two insulating oxides, LaAlO3 and SrTiO3, supported by the rise of nascent deposition and growth-monitoring techniques, which was an important direction in materials science research. The quest to understand the origin of this unparalleled physical property and to find other emergent properties has been an active field of research in condensed matter that has united researchers with expertise in diverse fields such as thin-film growth, defect control, advanced microscopy, semiconductor technology, computation, magnetism and electricity, spintronics, nanoscience, and nanotechnology.

Reconstructions at the Interface in Complex Oxide Heterostructures with Strongly Correlated Electrons

Author : Benjamin Adam Gray
Publisher :
ISBN 13 : 9781303654770
Total Pages : 240 pages
Book Rating : 4.6/5 (547 download)

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Book Synopsis Reconstructions at the Interface in Complex Oxide Heterostructures with Strongly Correlated Electrons by : Benjamin Adam Gray

Download or read book Reconstructions at the Interface in Complex Oxide Heterostructures with Strongly Correlated Electrons written by Benjamin Adam Gray and published by . This book was released on 2013 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strongly correlated oxides exhibit a rich spectrum of closely competing orders near the localized-itinerant Mott insulator transition leaving their ground states ripe with instabilities susceptible to small perturbations such as lattice distortions, variation in stoichiometry, magnetic and electric fields, etc. As the field of interfacial engineering has matured, these underlying instabilities in the electronic structure of correlated oxides continue to be leveraged to manipulate existing phases or search for emergent ones. The central theme is matching materials across the interface with disparate physical, chemical, electronic, or magnetic structure to harness interfacial reconstructions in the strongly coupled charge, spin, orbital, and lattice degrees of freedom. In this dissertation, we apply the above paradigm to cuprate-manganite and cuprate-titanate interfaces. We examine ultrathin YBa2Cu3O7/La2/3Ca1/3MnO3 multilayers, where interfacial charge reconstruction modulates the distribution of charge carriers within the superconducting planes and thereby act as dials to tune through the cuprate doping phase diagram. The ultrathin nature of the cuprate layers allows the reconstructed states to be resolved free of a bulk admixture. The depleted carriers are observed to directly enter the CuO2 planes. With increasing LCMO thickness, magnetic correlations are introduced, and coupling between interfacial Cu and Mn develops. The reconstructions in spin and electronic degrees of freedom found in cuprate-manganite heterostructures are expected to completely mask all other competing interactions. To this end, SrTiO3 is incorporated as a spacer material in cuprate-titanate multilayers to reveal the role of dimensionality, interlayer coupling, and broken translational symmetry. At the unit cell limit, a decrease in carrier concentration is found that directly correlates with underdoping from lost charge reservoir layers at the interface, while increased STO layer thickness is found to augment the carrier concentration with the charge reservoir layers but has no effect on the doping within the superconducting planes. Also spectroscopic evidence for charge transfer across the interface between Cu and Ti is shown to support a recent theoretical prediction of pre-doping at the cuprate-titanate interface in response to a polar discontinuity at the interface.

Oxide Electronics

Author : Asim K. Ray
Publisher : John Wiley & Sons
ISBN 13 : 1119529476
Total Pages : 628 pages
Book Rating : 4.1/5 (195 download)

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Book Synopsis Oxide Electronics by : Asim K. Ray

Download or read book Oxide Electronics written by Asim K. Ray and published by John Wiley & Sons. This book was released on 2021-04-12 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide Electronics Multiple disciplines converge in this insightful exploration of complex metal oxides and their functions and properties Oxide Electronics delivers a broad and comprehensive exploration of complex metal oxides designed to meet the multidisciplinary needs of electrical and electronic engineers, physicists, and material scientists. The distinguished author eschews complex mathematics whenever possible and focuses on the physical and functional properties of metal oxides in each chapter. Each of the sixteen chapters featured within the book begins with an abstract and an introduction to the topic, clear explanations are presented with graphical illustrations and relevant equations throughout the book. Numerous supporting references are included, and each chapter is self-contained, making them perfect for use both as a reference and as study material. Readers will learn how and why the field of oxide electronics is a key area of research and exploitation in materials science, electrical engineering, and semiconductor physics. The book encompasses every application area where the functional and electronic properties of various genres of oxides are exploited. Readers will also learn from topics like: Thorough discussions of High-k gate oxide for silicon heterostructure MOSFET devices and semiconductor-dielectric interfaces An exploration of printable high-mobility transparent amorphous oxide semiconductors Treatments of graphene oxide electronics, magnetic oxides, ferroelectric oxides, and materials for spin electronics Examinations of the calcium aluminate binary compound, perovoksites for photovoltaics, and oxide 2Degs Analyses of various applications for oxide electronics, including data storage, microprocessors, biomedical devices, LCDs, photovoltaic cells, TFTs, and sensors Suitable for researchers in semiconductor technology or working in materials science, electrical engineering, and physics, Oxide Electronics will also earn a place in the libraries of private industry researchers like device engineers working on electronic applications of oxide electronics. Engineers working on photovoltaics, sensors, or consumer electronics will also benefit from this book.