Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Magnetoelectric Coupling At Multiferroic Interfraces
Download Magnetoelectric Coupling At Multiferroic Interfraces full books in PDF, epub, and Kindle. Read online Magnetoelectric Coupling At Multiferroic Interfraces ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Magnetoelectric Coupling at Multiferroic Interfaces by : Michael Fechner
Download or read book Magnetoelectric Coupling at Multiferroic Interfaces written by Michael Fechner and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: When magnetism and ferroelectricity coexist in the same crystalline phase of a material it is called multiferroic. Furthermore, the crystal symmetry of a multiferroic material allows for magnetoelectric coupling which is quite useful since the coupling offers magnetization switching by an external electric field or electric polarization switching by an external magnetic field. In this thesis multiferroic interfaces are examined upon the occurrence of magnetoelectric coupling. Therefore first-principle methods based on density functional theory are used. The model system that are investigated consist of different ultrathin ferromagnetic films (Co and Fe) on top of ferroelectric ATiO3 (A=Pb, Ba) perovskites. The calculations show that at the interface a moderate change of the size of the total magnetization due to a change of the electric polarization occurs. Furthermore, the magnetic order of the Fe film is sensitive to its thickness, so an unexpected ferrimagnetic ordering appears for 2ML Fe whereas for all other thicknesses ferromagnetic ordering is preferred. Hybridization and strain effects at the interface explain the observations. Finally it is shown how the magnetic instability can be used to gain control of the magnetic ordering by the electric polarization.
Book Synopsis Magnetoelectric Coupling at Multiferroic Interfraces by : Michael Fechner
Download or read book Magnetoelectric Coupling at Multiferroic Interfraces written by Michael Fechner and published by . This book was released on 2010 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Book Synopsis Multiferroic Interfaces of Mixed Valency Systems Studied from First Principles by :
Download or read book Multiferroic Interfaces of Mixed Valency Systems Studied from First Principles written by and published by . This book was released on 2015 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiferroics; oxide interfaces; magnetoelectric coupling; two-dimensional electron gas; electron tunneling; tunneling magnetoresistance; density functional theory; Landauer-Büttiker formalism
Download or read book Multiferroics written by Andres Cano and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-06-21 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiferroics, materials with a coexistence of magnetic and ferroelectric order, provide an efficient route for the control of magnetism by electric fields. The authors cover multiferroic thin-film heterostructures, device architectures and domain/interface effects. They critically discuss achievements as well as limitations and assess opportunities for future applications.
Book Synopsis Multiferroic Materials by : Junling Wang
Download or read book Multiferroic Materials written by Junling Wang and published by CRC Press. This book was released on 2016-10-14 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: "a very detailed book on multiferroics that will be useful for PhD students and researchers interested in this emerging field of materials science" —Dr. Wilfrid Prellier, Research Director, CNRS, Caen, France Multiferroics has emerged as one of the hottest topics in solid state physics in this millennium. The coexistence of multiple ferroic/antiferroic properties makes them useful both for fundamental studies and practical applications such as revolutionary new memory technologies and next-generation spintronics devices. This book provides an historical introduction to the field, followed by a summary of recent progress in single-phase multiferroics (type-I and type-II), multiferroic composites (bulk and nano composites), and emerging areas such as domain walls and vortices. Each chapter addresses potential technological implications. There is also a section dedicated to theoretical approaches, both phenomenological and first-principles calculations.
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 2019-04-03 with total page 305 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.
Book Synopsis Magnetoelectric Coupling in Composite Multiferroic Heterostructures. by : Jason Hoffman
Download or read book Magnetoelectric Coupling in Composite Multiferroic Heterostructures. written by Jason Hoffman and published by . This book was released on 2011-10-01 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, we demonstrate a large charge-mediated magnetoelectric coupling in a PbZr0.2Ti0.8O3 / La0.8 Sr0.2MnO3 (PZT/LSMO) composite structure resulting from direct control of magnetism via charge carrier density. This approach has the advantage that its physical mechanism is transparent and the size of the effect can be quantified and understood qualitatively within the double-exchange model. Direct quantification of the charge-driven magnetic changes based on electronic, magnetic, and spectroscopic measurements show that both the spin state and spin configuration of LSMO are modulated.Using a combination of advanced physical vapor deposition techniques, we have grown epitaxial PZT/LSMO bilayer heterostructures on (001) SrTiO 3 substrates with excellent crystallinity, atomically smooth surfaces, low leakage current density, and abrupt interfaces. Magneto-optic Kerr effect (MOKE) magnetometry was used to directly interrogate the local magnetic state of the LSMO as a function of the PZT polarization state. We show direct control of magnetism via applied electric fields, including modulation of the magnetotransport behavior and magnetic-ordering temperature, on/off switching of magnetism, and hysteretic magnetization versus electric field (M-E) characteristics. The magnetoelectric coupling strength, which relates the change in magnetization to the applied electric field, is found to vary strongly with temperature, reaching a low temperature saturation value of +6 Oe cm / kV, much larger than observed in single-phase magnetoelectrics and too large to be explained by a simple band-filling model. To clarify the origin of the magnetoelectric coupling, we carried out near edge x-ray absorption measurements that revealed a well defined change in the position of the Mn absorption edge with the ferroelectric polarization, giving a direct measure of the change in Mn valency in LSMO. We explain these results in terms of an interfacial magnetic reconstruction, whereby the spin coupling at the interface changes from ferromagnetic to antiferromagnetic.This work opens new avenues for the development of novel nanoscale devices, such as spin-based technologies with large coupling between electric and magnetic degrees of freedom and Mott metal-insulator transition field effect memories and logic devices. Along these lines, we have demonstrated a non-volatile memory using an electric field induced metal-insulator transition. We characterized several key aspects of device performance, including on/off ratio, switching time, and retention, with an emphasis on lateral and vertical scaling and integration with mainstream semiconductor manufacturing.
Book Synopsis The Effect of Magnetoelectric Coupling and Magnetic Correlations on Temperature and Field-driven Transitions in Magnetic and Multiferroic Materials by : Karen L. Livesey
Download or read book The Effect of Magnetoelectric Coupling and Magnetic Correlations on Temperature and Field-driven Transitions in Magnetic and Multiferroic Materials written by Karen L. Livesey and published by . This book was released on 2009 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetoelectric coupling and magnetic correlations are shown to affect coupled order parameters, magnetisation M and electric polarisation P, in a multiferroic material. A ferromagnetic ferroelectric system is considered with two types of magnetoelectric coupling (anisotropic and isotropic) which couple P to different magnetic correlations. Using a mean field calculation for anisotropic coupling, it is shown that magnetic fluctuations h(Sz i )2i alter P even for temperatures above the magnetic Curie temperature. For isotropic coupling, a Green's function technique with a Random Phase Approximation is used to calculate how transverse correlations between neighbouring magnetic spins at sites i and j, such as hSx i Sx j i, affect P. The ferroelectric transition temperature and even the order of the transition is altered by the inclusion of magnetic correlations. Thermal hysteresis of the electric polarisation is also shown to exist in this model system. The methods presented can be extended to treat multiferroic systems with more complicated magnetic orderings. Another consequence of magnetoelectric coupling is the hybridisation of magnetic/electric excitations, known as "electromagnons." We show that for a ferroelectric canted antiferromagnet (with a weak ferromagnetic moment) with isotropic magnetoelectric coupling an electromagnon mode exists. When such a material, together with a ferromagnet, form a thin film heterostructure, dipolar coupling between the films allows for the electromagnon frequency to be tuned in the microwave regime. We use an effective medium method that takes into account electromagnetic boundary conditions to find the high frequency susceptibility of such composites and identify the type of resonant modes. However, the magnetoelectric coupling is usually weak through dipolar coupling. Magnetostrictive/piezoelectric composites have been shown to have a much larger strain-mediated magnetoelectric coupling so we detail how the effective medium method can be extended to treat such systems. It has been shown that in magnetostrictive/piezoelectrive composites, electric field can drive a magnetisation reorientation transition. Such electric field control of magnetisation is one of the chief aims in the study of multiferroic materials. However, the dynamics of such an electric field-driven magnetisation reorientation have not been studied as yet, either experimentally or theoretically. As a first step, a study of how nonlinear spin wave processes (or correlations) may alter the dynamics of magnetic field-driven magnetisation reorientation in thin magnetic films is presented here. A classical Hamiltonian formalism is developed to calculate the threshold magnetisation precession angle above which threeand four-wave decay of uniform precession may occur. The analytic results for fourwave scattering are used to qualitatively explain experimental results of the magnetisation coherency during reorientation in 15 nm Ni81Fe19 films. Possible extensions to multiferroic systems are discussed briefly.
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 2019-03-21 with total page 264 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.
Book Synopsis 2D Monoelemental Materials (Xenes) and Related Technologies by : Zongyu Huang
Download or read book 2D Monoelemental Materials (Xenes) and Related Technologies written by Zongyu Huang and published by CRC Press. This book was released on 2022-04-19 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monoelemental 2D materials called Xenes have a graphene-like structure, intra-layer covalent bond, and weak van der Waals forces between layers. Materials composed of different groups of elements have different structures and rich properties, making Xenes materials a potential candidate for the next generation of 2D materials. 2D Monoelemental Materials (Xenes) and Related Technologies: Beyond Graphene describes the structure, properties, and applications of Xenes by classification and section. The first section covers the structure and classification of single-element 2D materials, according to the different main groups of monoelemental materials of different components and includes the properties and applications with detailed description. The second section discusses the structure, properties, and applications of advanced 2D Xenes materials, which are composed of heterogeneous structures, produced by defects, and regulated by the field. Features include: Systematically detailed single element materials according to the main groups of the constituent elements Classification of the most effective and widely studied 2D Xenes materials Expounding upon changes in properties and improvements in applications by different regulation mechanisms Discussion of the significance of 2D single-element materials where structural characteristics are closely combined with different preparation methods and the relevant theoretical properties complement each other with practical applications Aimed at researchers and advanced students in materials science and engineering, this book offers a broad view of current knowledge in the emerging and promising field of 2D monoelemental materials.
Book Synopsis An Investigation of the Inter-phase Magnetoelectric Coupling Phenomenon in Nanoscale Multiferroic Composite Devices by : S. R. Jackson
Download or read book An Investigation of the Inter-phase Magnetoelectric Coupling Phenomenon in Nanoscale Multiferroic Composite Devices written by S. R. Jackson and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nanostructured Multiferroics by : Raneesh Balakrishnan
Download or read book Nanostructured Multiferroics written by Raneesh Balakrishnan and published by John Wiley & Sons. This book was released on 2021-06-01 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the state of the art in multiferroic materials with this cutting-edge resource Nanostructured Multiferroics delivers an overview of recent research developments in the area of nanostructured multiferroics, along with their preparation, characterization, and applications. Covering single-phase and composite multiferroics, nanomultiferroics, and multiferroic composites, the book explains their physical properties, the underlying physical principles, and the technology and application aspects of the materials, including energy harvesting and spintronics. With multiferroics undergoing a renaissance of renewed interest and development in the past few years, and with promising new breakthroughs in areas like superconductivity, spintronics, and quantum computing, Nanostructured Multiferroics offers both experienced scientists and young researchers inspirational and informative resources likely to spark ideas for further research. Along with chapters discussing topics such as the specific heat and magnetocaloric properties of manganite-based multiferroics for cryo-cooling applications and the multiferroic properties of barium-doped BiFeO3 particles, further topics are: * A comprehensive discussion about the physical properties of multiferroic nanocomposites * An exploration of the basic theory underpinning a variety of multiferroic interactions * An in-depth analysis of the engineering functionality in nanomultiferroics * An introduction to nanostructured multiferroics accompanied by discussions of their synthesis, characterization, and common applications * A treatment of multiferroic materials, as well as single-phase and composite multiferroics * An examination of the use of nanostructured multiferroics in the field of spintronics Perfect for materials scientists, Nanostructured Multiferroics will also earn a place in the libraries of solid-state physicists and chemists who seek to improve their understanding of the fundamentals of, and recent advances made in, multiferroics. The information contained within will inform anyone working in areas involving superconductivity, quantum computing, and spintronics.
Book Synopsis Magnetoelectric Polymer-Based Composites by : Senentxu Lanceros-Méndez
Download or read book Magnetoelectric Polymer-Based Composites written by Senentxu Lanceros-Méndez and published by John Wiley & Sons. This book was released on 2017-10-23 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book on this topic provides a comprehensive and well-structured overview of the fundamentals, synthesis and emerging applications of magnetoelectric polymer materials. Following an introduction to the basic aspects of polymer based magnetoelectric materials and recent developments, subsequent chapters discuss the various types as well as their synthesis and characterization. There then follows a review of the latest applications, such as memories, sensors and actuators. The book concludes with a look at future technological advances. An essential reference for entrants to the field as well as for experienced researchers.
Book Synopsis An Investigation of the Inter-phase Magnetoelectric Coupling Phenomenon in Nanoscale Multiferroic Composite Devices by : Stuart Raymond Jackson
Download or read book An Investigation of the Inter-phase Magnetoelectric Coupling Phenomenon in Nanoscale Multiferroic Composite Devices written by Stuart Raymond Jackson and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Strain and Charge Co-mediated Magnetoelectric Coupling in Thin Film Multiferroic Heterostructures by : Xinjun Wang
Download or read book Strain and Charge Co-mediated Magnetoelectric Coupling in Thin Film Multiferroic Heterostructures written by Xinjun Wang and published by . This book was released on 2015 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, more and more researching has been focused on multiferroic materials and devices due to the demonstrated strong magnetoelectric coupling in new multiferroic materials, artificial multiferroic heterostructures and devices with unique functionalities and superior performance characteristics. This has resulted in opportunities for us to achieve compact, fast, energy efficient and voltage tunable spintronic devices. Traditionally, in magnetic materials based magnetic random access memories (MRAM) devices, magnetization is used to store the binary information. Since the high coercivity of the ferromagnetic media requires high magnetic fields for switching the magnetic states, so it needs large amount of energy. A spin torque technique that is used in Modern MRAM information writing processes minimizes the large energy for generating a magnetic field by passing through a spin-polarized current directly to the magnets. However, this two methods still consumes a lot of energy because of the large current or current density requirement to toggle the magnetic bits. Many papers reports that spin is controlled by the electrical field which supplies new opportunities for power efficient voltage control of magnetization in spintronic devices for magnetoeletric random use for memories (MERAM) with ultra-low energy consumption. However, state of the art multiferroic materials still make it chatting to realize non-volatile 180 magnetization reversal, which is desired in realizing MERAM. In a strain-mediated multiferroic system, the typical modification of the magnetism of ferromagnetic phase as a function of bipolar electric field shows a "butterfly" like behavior. This is due to the linear piezoelectricity of ferroelectric phase which has a "butterfly" like piezostrain as a function of electric field curve resulting from ferroelectric domain wall switching. Compared with charge-mediated multiferroic, the strain-mediated multiferroic system needs much higher voltage than charge-mediated, because of the thickness of ferroelectric is different. In a strain-mediated multiferroic system, the substrate is bulk materials and in a charge-mediated multiferroic system, the substrate is a thin film on dielectric material. In this work, we study the equivalence of direct and converse magnetoelectric effects. The resonant direct and converse magnetoelectric (ME) effects have been investigated experimentally. For a strain-mediated multiferroic system, we use PIN-PMN-PT, PMN-PT as the substrate. LFO, YIG, FeGaB are used as the magnetic thin film to study the tubability. This linear piezoelectric effect in converse magnetoelectric coupling would lead to "butter-fly" like magnetization vs. electric field curve which leads to a "volatile" behavior in magnetic memory system. In a charge-mediated system, we use NiFe/PLZT/Si to study the tunability. The frequency responses of direct and converse magnetoelectric effects were measured under the same electric and magnetic bias conditions. In this study, VSM and FMR are studies in different situation. Furthermore, we studied the low temperature fabricated multiferroic heterostructure, to find out the best solution to get the thin film by spin spray. Different PH and temperature are used. VSM and FMR were employed to measure properties of thin film. XRD and SEM were used to analyse the composition and surface.
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.
