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Structural Characterisation Of Complex Oxide Rare Earth Manganite Thin Films By Electron Microscopy
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Book Synopsis Structural Characterisation of Complex Oxide & Rare Earth Manganite Thin Films by Electron Microscopy by : Neerushana Jehanathan
Download or read book Structural Characterisation of Complex Oxide & Rare Earth Manganite Thin Films by Electron Microscopy written by Neerushana Jehanathan and published by . This book was released on 2011 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rare Earth Oxide Thin Films by : Marco Fanciulli
Download or read book Rare Earth Oxide Thin Films written by Marco Fanciulli and published by Springer. This book was released on 2009-09-02 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin rare earth (RE) oxide films are emerging materials for microelectronic, nanoelectronic, and spintronic applications. The state-of-the-art of thin film deposition techniques as well as the structural, physical, chemical, and electrical properties of thin RE oxide films and of their interface with semiconducting substrates are discussed. The aim is to identify proper methodologies for the development of RE oxides thin films and to evaluate their effectiveness as innovative materials in different applications.
Book Synopsis Rare Earth Oxide Thin Films by : Marco Fanciulli
Download or read book Rare Earth Oxide Thin Films written by Marco Fanciulli and published by Springer Science & Business Media. This book was released on 2007 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin rare earth (RE) oxide films are emerging materials for microelectronic, nanoelectronic, and spintronic applications. The state-of-the-art of thin film deposition techniques as well as the structural, physical, chemical, and electrical properties of thin RE oxide films and of their interface with semiconducting substrates are discussed. The aim is to identify proper methodologies for the development of RE oxides thin films and to evaluate their effectiveness as innovative materials in different applications.
Book Synopsis Depth-dependent Chemical and Structural Profiling of Oxide Thin Films with Scanning Transmission Electron Microscopy by : Aubrey Nance Penn
Download or read book Depth-dependent Chemical and Structural Profiling of Oxide Thin Films with Scanning Transmission Electron Microscopy written by Aubrey Nance Penn and published by . This book was released on 2021 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Epitaxial Thin Films and Heterojunctions of Electron Doped Manganite La1-Xhfxmno3 by : Libin Jin
Download or read book Epitaxial Thin Films and Heterojunctions of Electron Doped Manganite La1-Xhfxmno3 written by Libin Jin and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Epitaxial Thin Films and Heterojunctions of Electron Doped Manganite La1-xHfxMnO3" by Libin, Jin, 靳立彬, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled EPITAXIAL THIN FILMS AND HETEROJUNCTIONS OF ELECTRON DOPED MANGANITE La Hf MnO 1-x x 3 Submitted by Jin Libin For the Degree of Master of Philosophy at The University of Hong Kong in October 2015 The strong electron correlated system like perovskite oxides in transition metal oxides have been studied for many years. Most efforts have been focused mainly 3+ 4+ on the hole-doped manganites with Mn /Mn double exchange interaction. Recently, the tetravalent ions doping has attracted considerable attention to make electron doping LaMnO compounds. Such electron-doped manganites may be applied for fabrication of all-manganites devices potentially. The sensitivities to magnetic fields, currents, electric fields, photo illumination and mechanical strain make the electron-doped manganites of great interests for relevant applications. In this thesis, thin films and heterojunctions of tetravalent hafnium doped perovskite manganite La Hf MnO were fabricated. The hafnium shows a 1-x x 3 unique tetravalent state as well as an ion radius closed to trivalent lanthanum ion. These properties make the investigation on La Hf MnO system relatively 1-x x 3 simple and reliable. The structural and physical properties of La Hf MnO (x=0.1, 0.2, 0.3) thin 1-x x 3 films were studied systematically. The crystal structure and epitaxy of La 1- Hf MnO thin films were examined by X-ray diffraction. The temperature x x 3 dependent resistance and magnetization of different samples were investigated in detail. Both temperature dependent resistance and field dependent magnetization indicated the evident transition between paramagnetic and ferromagnetic states. The electronic structures of epitaxial La Hf MnO were measured by X-ray 0.9 0.1 3 Photoelectron Spectroscopy. Both spectrum of Mn 3s and Mn 2p demonstrated 2+ 3+ the composition of Mn /Mn ions. Such evidence strongly suggested the electron-conductive mechanism in La Hf MnO systems. 0.9 0.1 3 The heterojunctions composed of oxygen-deficient SrTiO and 3-δ La Hf MnO thin films have been studied. These heterojunctions demonstrate 0.9 0.1 3 good rectifying characteristics with very low leakage current and high breakdown voltage in a wide temperature range. X-ray diffraction and electron backscattering diffraction measurements reveal that both SrTiO and La Hf MnO layers 3-δ 0.9 0.1 3 have single crystal nature and [001]-orientation. Transmission electron microscope images show an excellent epitaxial growth of SrTiO and 3-δ La Hf MnO layers. Such all-oxides junctions utilizing the bi-layer 0.9 0.1 3 heterostructure may be applied in microelectronic devices. The n-i-p heterojunctions have been fabricated by depositing an n-type La Hf MnO layer on p-type Si with a thin SrTiO intermediate layer. These 0.9 0.1 3 3 junctions exhibit excellent rectifying properties for temperature from 20 K to 300 K. Under illumination of 630 nm light a remarkable photocurrent has been observed. The photosensitivity is over 1200% under -3 V bias and illumination of the light at room temperature, demonstrating very a pronounced photocurrent effect. The injection of photo-carriers could be responsible for the observed phenomenon. The obtained results in this thesis demonstrate the electron-conductive mechanism in La Hf MnO system. The La Hf MnO based heterojunctions 1-x x 3 0.9 0.1 3 show remarkable characteristics and may
Book Synopsis Metal Oxide-Based Thin Film Structures by : Nini Pryds
Download or read book Metal Oxide-Based Thin Film Structures written by Nini Pryds and published by Elsevier. This book was released on 2017-09-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide-Based Thin Film Structures: Formation, Characterization and Application of Interface-Based Phenomena bridges the gap between thin film deposition and device development by exploring the synthesis, properties and applications of thin film interfaces. Part I deals with theoretical and experimental aspects of epitaxial growth, the structure and morphology of oxide-metal interfaces deposited with different deposition techniques and new developments in growth methods. Part II concerns analysis techniques for the electrical, optical, magnetic and structural properties of thin film interfaces. In Part III, the emphasis is on ionic and electronic transport at the interfaces of Metal-oxide thin films. Part IV discusses methods for tailoring metal oxide thin film interfaces for specific applications, including microelectronics, communication, optical electronics, catalysis, and energy generation and conservation. This book is an essential resource for anyone seeking to further their knowledge of metal oxide thin films and interfaces, including scientists and engineers working on electronic devices and energy systems and those engaged in research into electronic materials.
Book Synopsis Magnetic Oxides by : Gerald F. Dionne
Download or read book Magnetic Oxides written by Gerald F. Dionne and published by Springer Science & Business Media. This book was released on 2010-03-26 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Oxides offers a cohesive up-to-date introduction to magnetism in oxides. Emphasizing the physics and chemistry of local molecular interactions essential to the magnetic design of small structures and thin films, this volume provides a detailed view of the building blocks for new magnetic oxide materials already advancing research and development of nano-scale technologies. Clearly written in a well-organized structure, readers will find a detailed description of the properties of magnetic oxides through the prism of local interactions as an alternative to collective electron concepts that are more applicable to metals and semiconductors. Researchers will find Magnetic Oxides a valuable reference.
Book Synopsis Structural, Magnetic and Electronic Properties of (110)-OrientedEpitaxial Thin Films of Bilayer Manganite La1.2Sr1.8Mn2O7 by :
Download or read book Structural, Magnetic and Electronic Properties of (110)-OrientedEpitaxial Thin Films of Bilayer Manganite La1.2Sr1.8Mn2O7 written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We have synthesized (110)-oriented epitaxial thin films of the bilayer (n=2) manganite, La{sub 1.2}Sr{sub 1.8}Mn2O--, with the metallic/ferromagnetic a-b planes lying perpendicular to the substrate surface and the c-axis aligned in the plane of the film. X-ray diffraction and transmission electron microscopy confirm the alignment of the a-b planes along the [1{bar 1}0] substrate direction. The films consist primarily of the n=2 phase with a minor component of the n=1 (La, Sr)2MnO4 and n=(infinity) (La, Sr)MnO3 phases. A resistivity maximum coincides with a ferromagnet/paramagnet transition at a reduced T{sub c}(almost equal to)90K (vs. 120K for bulk), indicative of the effects of epitaxial strain. The films display similar anisotropic properties to their bulk counterpart with the magnetically easy direction confined to the a-b planes and 20-200 times lower resistivity for current flowing along the a-b planes compared to the c-axis.
Book Synopsis Physics of Manganites by : T.A. Kaplan
Download or read book Physics of Manganites written by T.A. Kaplan and published by Springer Science & Business Media. This book was released on 1999-05-31 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series of books, which is published at the rate of about one per year, addresses fundamental problems in materials science. The contents cover a broad range of topics from small clusters of atoms to engineering materials and involves chemistry, physics, materials science and engineering, with length scales ranging from Ångstroms up to millimeters. The emphasis is on basic science rather than on applications. Each book focuses on a single area of current interest and brings together leading experts to give an up to date discussion of their work and the work of others. Each article contains enough references that the interested reader can access the relevant literature. Thanks are given to the Center for Fundamental Materials Research at Michigan State University for supporting this series. M. F. Thorpe, Series Editor E mail: thorpe@pa. msu. edu V PREFACE This book records invited lectures given at the workshop on Physics of Manganites, held at Michigan State University, July 26 29, 1998. Doped manganites are an interesting class of compounds that show both metal insulator and ferromagnetic to paramagnetic transitions at the same temperature. This was discovered in the early 1950s by Jonker and van Santen and basic theoretical ideas were developed by Zener (1951), Anderson and Hasegawa (1955), and deGennes (1960) to explain these transitions and related interesting observations.
Book Synopsis Preparation and Structural Analysis of Multiferroic Rare Earth Manganate Thin Films by : Yi Hu
Download or read book Preparation and Structural Analysis of Multiferroic Rare Earth Manganate Thin Films written by Yi Hu and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Structure of Complex Oxide Thin Films by : Vedran Vonk
Download or read book Growth and Structure of Complex Oxide Thin Films written by Vedran Vonk and published by . This book was released on 2006 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural and Magnetotransport Properties of Bulk Rare Earth Barium Manganite and (la, Pr)-ba-mn-o Single-and Bi-layer Thin Films by : Jen Kuen Wong
Download or read book Structural and Magnetotransport Properties of Bulk Rare Earth Barium Manganite and (la, Pr)-ba-mn-o Single-and Bi-layer Thin Films written by Jen Kuen Wong and published by . This book was released on 2011 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Topological and Electronic Properties of Electron-doped Manganite Thin Films by : Lorenzo Vistoli
Download or read book Topological and Electronic Properties of Electron-doped Manganite Thin Films written by Lorenzo Vistoli and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxide thin films feature a wide range of physical phenomena and rich phase diagrams tunable by strain and interface engineering. CaMnO3, in particular, is extremely sensitive to both doping and strain and, when grown with compressive strain, transitions from an insulating and antiferromagnetic state to a metallic and weakly ferromagnetic state at only 2% Ce doping.We used a combination of angle-resolved photoemission spectroscopy, magnetotransport, and density functional theory to study the electronic properties of this material. We observed the existence of two separate charge carriers, light electrons and heavy polarons, whose physical nature differs because of drastically different couplings to phonons. We ascribe these differences to a different relative band filling due to correlations, which enhance greatly the coupling to phonons of the heavy polarons band. Magnetotransport experiments reveal that the polaron band dominates transport despite its lower mobility.Compressive strain also gives rise to a strong magnetic anisotropy which stabilizes magnetic bubbles that accompany a topological Hall effect. This suggests that these bubbles have topological character, i.e. are skyrmion bubbles. The topological Hall effect diverges as the manganite approaches the metal-insulator transition at low dopings. We used a recently developed theory in order to interpret this behavior, and we conclude that correlations may come into play, enhancing the effective mass of the carriers, and in turn the topological Hall effect.As this manganite is highly sensitive to changes in doping and carrier density, we grew BiFeO3/(Ca,Ce)MnO3 ferroelectric field-effect transistors. Upon switching the ferroelectric polarization of the BiFeO3 top layer, we could not observe any sizable changes in the properties of the underlying manganite layers. We used transmission electron microscopy to study the properties of these bilayers with an atomic resolution, and we observed that polarization pinning at the BiFeO3/(Ca,Ce)MnO3 impedes a complete switch of the polarization and so reduces the operational capabilities of these devices. Nevertheless, we could detect modifications of the electronic properties of the manganite induced by polarization reversal at the atomic scale.
Book Synopsis Optical Properties of Polymers by : G.H. Meeten
Download or read book Optical Properties of Polymers written by G.H. Meeten and published by Springer. This book was released on 1986-10-31 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Emergent Phenomena in Spatially Confined Manganites by :
Download or read book Emergent Phenomena in Spatially Confined Manganites written by and published by . This book was released on 2008 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rare earth manganites exhibit colossal magnetoresistance (CMR). There is evidence that alloyed single crystal materials in this class can display electronic inhomogeneity in which areas with vastly different electronic and magnetic properties can form and coexist in phase separated domains ranging in size from a few nanometers to micrometers. This phase separation (PS) is of particular interest, as it has been suggested that it is the central feature that leads to CMR in manganites, the Mott transition in VO2 and may play a role in high-TC superconductivity in cuprates. However there is debate as to its precise role. The purpose of my research is to answer fundamental questions about the specific role of PS in complex oxides. I reduce single crystal thin films of an electronically phase separated manganite to the scale of their inherent electronic phase domains near the metal-insulator transition. Unlike transport measurements done on bulk or thin films where the electrons follow only the metallic path of least resistance, this configuration forces electrons to travel through both the metallic and insulating regions residing in the material. This has led to observations of several new phenomena such as a reemergent metal-insulator transition, ultra-sharp jumps in resistivity at the metal-insulator transition, and the first high resolution observation of single domain electronic phase transitions in the time domain. While the manganites will be the primary focus throughout this dissertation, the spatial confinement techniques presented here are not limited to only these materials. They can be applied to any phase separated system to probe regions resistively hidden to transport measurements.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hard X-ray Photoelectron Spectroscopy (HAXPES) by : Joseph Woicik
Download or read book Hard X-ray Photoelectron Spectroscopy (HAXPES) written by Joseph Woicik and published by Springer. This book was released on 2015-12-26 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the first complete and up-to-date summary of the state of the art in HAXPES and motivates readers to harness its powerful capabilities in their own research. The chapters are written by experts. They include historical work, modern instrumentation, theory and applications. This book spans from physics to chemistry and materials science and engineering. In consideration of the rapid development of the technique, several chapters include highlights illustrating future opportunities as well.
