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Electronic Structures And Magnetic Properties Of Iron In Various Magnetic States And Structural Phases
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Book Synopsis Electronic Structures and Magnetic Properties of Iron in Various Magnetic States and Structural Phases by : Songshi S. Peng
Download or read book Electronic Structures and Magnetic Properties of Iron in Various Magnetic States and Structural Phases written by Songshi S. Peng and published by . This book was released on 1991 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Total energy calculations based on density functional theory are generally a good approach to obtain the properties of solids. The local density approximation (LDA) is widely used for calculating the ground state properties of electronic systems; for excited states the errors are in general unknown. The important aspects of LDA pertain to the modeling of the exchange-correlation interaction. If the exchange-correlation potential is approximately the same for the ground and excited states, one expects good results from the LDA calculations for excited states. In this thesis, we utilize the total energy technique for numerical computations of the electronic structure of iron in several magnetic phases and crystalline structures. 1. Body-centered-cubic iron in the ferromagnetic and several antiferromagnetic configurations. We use the total energy results to obtain the parameters in a model Heisenberg Hamiltonian. These include the interaction parameters up to 6-th nearest neighbors. Based on this model Hamiltonian we calculate properties such as the critical (Curie) temperature and spin stiffness constant. We assume that the total exchangecorrelation energy functional is the same in the ferromagnetic ground state and the antiferromagnetic excited states. Our model parameters are based directly on ab initio calculations of the electronic structure. Our calculation yields good results compared with experimental values and earlier work. Some other physical quantities, related to the phase transition, and spin waves are also discussed. 2. Face-centered-tetragonal iron. If iron is grown on a proper substrate (e.g., Cu(100)), the crystal structure of the thin film displays a face-centered-tetragonal distortion due to the lattice constant misfit between the film and substrate. Therefore, we performed calculations for fct iron in its ferromagnetic, antiferromagnetic, and nonmagnetic phases for a wide range of values of the lattice parameters. In the ferromagnetic calculations, we found two minima in the total energy: one is close to.the bcc structure and the other (with a lower energy) is close to fcc. In the antiferromagnetic and nonmagnetic calculations, we found in each case that there is only one minimum near the fcc structure, providing us clear evidence that the antiferromagnetic and nonmagnetic states are (meta)stable near the fcc region and unstable in bcc region. The antiferromagnetic and nonmagnetic states are almost degenerate near the fcc minimum, but the antiferromagnetic phase has the lowest total energy in the whole fct region. Magnetic moments are also calculated for a variety of fct structures. Near the fcc minimum we found that two ferromagnetic phases co-exist, one with a low spin and one with a high spin. These results are consistent with experimental facts and other earlier calculations. Some structural properties, such as the elastic constants and the bulk modulus, are also studied and compared with experimental data and some earlier calculations.
Book Synopsis Electronic Structure and Magnetic Properties of Iron by Ab Initio Calculations by : S Mojmir
Download or read book Electronic Structure and Magnetic Properties of Iron by Ab Initio Calculations written by S Mojmir and published by . This book was released on 2001 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Magnetic and Electron Structures of Transition Metals and Alloys by : V. G. Veselago
Download or read book The Magnetic and Electron Structures of Transition Metals and Alloys written by V. G. Veselago and published by Nova Publishers. This book was released on 1988 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic Structure of Materials by : Natalia Chezhina
Download or read book Electronic Structure of Materials written by Natalia Chezhina and published by CRC Press. This book was released on 2019-04-01 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a short survey of magnetochemistry as a promising method for revealing the electronic structure of inorganic substances, particularly solid oxide materials. It is supported by five chapters that describe materials with various structures and applications, showing how the method of magnetic dilution with the aid of other physical methods (electron spin resonance, magnetization, Raman and Mössbauer spectroscopy, and electrical conductivity), accompanied by thorough structural and quantum mechanical studies, may be used for describing the states of atoms and interatomic interactions in multicomponent oxide systems. The book will serve as a guide for researchers in the field of various oxide materials, since it shows the roots for selecting the best structures and qualitative and quantitative compositions of oxide materials on the basis of the knowledge about their electronic structure. It is devoted to some of the most popular structures of multicomponent oxides among modern materials—perovskites and pyrochlores—giving a unified approach to their chemical structure.
Book Synopsis Constitution and Magnetism of Iron and its Alloys by : Werner Pepperhoff
Download or read book Constitution and Magnetism of Iron and its Alloys written by Werner Pepperhoff and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the foundations of understanding the physical nature of iron and its alloys. Basics and recent developments concerning its constitution and magnetism are presented as well as its thermal properties.
Book Synopsis Atomistic Spin Dynamics by : Olle Eriksson
Download or read book Atomistic Spin Dynamics written by Olle Eriksson and published by Oxford University Press. This book was released on 2017 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several large experimental facilities that focus on detection and probing magnetization dynamics have been realized in Europe, USA and Japan. This book covers theoretical and practical aspects of the vibrant and emerging research field of magnetization dynamics.
Book Synopsis Electronic Structure and Magnetism of Inorganic Compounds by : P Day
Download or read book Electronic Structure and Magnetism of Inorganic Compounds written by P Day and published by Royal Society of Chemistry. This book was released on 1972-12-31 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued. The current list of Specialist Periodical Reports can be seen on the inside flap of this volume.
Book Synopsis The Superconducting and Magnetic Properties of the Iron-Chalcogenides by : Markus Bendele
Download or read book The Superconducting and Magnetic Properties of the Iron-Chalcogenides written by Markus Bendele and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2013 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is focused on the simplest of the iron-based high temperature superconductors, namely the binary iron chalcongenide family. Compared to the other families, it consists of a stack of FeCh layers only. It is considered an ideal modeling system for the other iron-based superconductors due to its simplicity and its similarity with their electronic structure. The electronic phase diagrams of the FeCh family contain the appearance of different ground states. Whereas the mother compounds are in general antiferromagnetically ordered, the material becomes superconducting after going through a region where superconductivity and magnetism coexist. In the framework of this book, the FeCh system was tuned solely by changing the lattice either by hydrostatic or chemical pressure and without introducing additional charge carriers. The muon spin rotation/relaxation/resonance technique in combination with ac and dc magnetization experiments is an ideal tool to investigate the superconducting and magnetic states and the interplay in a sense of competition and/or coexistence between them.
Book Synopsis Fundamental Magnetic Studies of Iron-rare-earth-metalloid Alloys by :
Download or read book Fundamental Magnetic Studies of Iron-rare-earth-metalloid Alloys written by and published by . This book was released on 1989 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research is focused on the synthesis of new iron-rare-earth magnetic phases which may have significant technological properties. An important aim is to investigate new methods for producing these materials such as melt spinning and sputtering plus specific heat treatments. Studies are made of the relationship between microstructure and properties such as coercivity, spontaneous magnetization, and anisotropy (magnitude and direction) in bulk and thin film samples. Our goal is to understand these relatively complex materials on the basis of fundamental electronic structure, theory is of itinerant magnetism and localized 4f electronic states, and the microstructural effects which control the extrinsic properties. To achieve this a broad range of experiments and calculations are performed. In the following we describe briefly some of our recent accomplishments, with emphasis on work performed in the last six months.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Iron-Based Superconductivity by : Peter D. Johnson
Download or read book Iron-Based Superconductivity written by Peter D. Johnson and published by Springer. This book was released on 2015-01-06 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents an in-depth review of experimental and theoretical studies on the newly discovered Fe-based superconductors. Following the Introduction, which places iron-based superconductors in the context of other unconventional superconductors, the book is divided into three sections covering sample growth, experimental characterization, and theoretical understanding. To understand the complex structure-property relationships of these materials, results from a wide range of experimental techniques and theoretical approaches are described that probe the electronic and magnetic properties and offer insight into either itinerant or localized electronic states. The extensive reference lists provide a bridge to further reading. Iron-Based Superconductivity is essential reading for advanced undergraduate and graduate students as well as researchers active in the fields of condensed matter physics and materials science in general, particularly those with an interest in correlated metals, frustrated spin systems, superconductivity, and competing orders.
Book Synopsis Electronic Structure and Properties of Transition Metal Compounds by : Isaac B. Bersuker
Download or read book Electronic Structure and Properties of Transition Metal Compounds written by Isaac B. Bersuker and published by John Wiley & Sons. This book was released on 2010-12-01 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: With more than 40% new and revised materials, this second edition offers researchers and students in the field a comprehensive understanding of fundamental molecular properties amidst cutting-edge applications. Including ~70 Example-Boxes and summary notes, questions, exercises, problem sets, and illustrations in each chapter, this publication is also suitable for use as a textbook for advanced undergraduate and graduate students. Novel material is introduced in description of multi-orbital chemical bonding, spectroscopic and magnetic properties, methods of electronic structure calculation, and quantum-classical modeling for organometallic and metallobiochemical systems. This is an excellent reference for chemists, researchers and teachers, and advanced undergraduate and graduate students in inorganic, coordination, and organometallic chemistry.
Book Synopsis Electronic Structure and Magnetic Properties of Multicomponent Ferromagnetic Systems by : Hristo G. Kolev
Download or read book Electronic Structure and Magnetic Properties of Multicomponent Ferromagnetic Systems written by Hristo G. Kolev and published by . This book was released on 2008 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Magnetic Nanostructures by : D.J. Sellmyer
Download or read book Advanced Magnetic Nanostructures written by D.J. Sellmyer and published by Springer Science & Business Media. This book was released on 2006-07-02 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced magnetic nanostructures is an emerging field in magnetism and nanotechnology, but the literature consists of a rich variety of original papers and parts of reviews and books whose scope is comparatively broad. This calls for a book with specific emphasis on state-of-the-art synthetic methods for fabricating, characterizing and theoretically modeling new magnetic nanostructures. This book is intended to provide a comprehensive overview of the present state of the field. Leading researchers world-wide have contributed a survey of their special ties to guide the reader through the exploding literature in nanomagnetic structures. The focus is on deliberately structured nanomagnets. It includes cluster assembled, self-organized and patterned thin films but excludes, for example, multilayered thin films. We target both industrial and academic researchers in magnetism and related areas, such as nanotechnology, materials science, and theoretical solid-state physics.
Book Synopsis Metallic Magnetism by : Herbert Capellmann
Download or read book Metallic Magnetism written by Herbert Capellmann and published by Springer. This book was released on 2012-07-07 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The magnetism of iron and other transition metals had been a subject of inten sive research for a long time, but the understanding of the microscopic origin of "metallic magnetism" was quite limited until the early 1970's. During the last 10 to 15 years both theory and experiment contributed towards signif icant progress in this field, such that today a qualitative understanding has been achieved. The word "qualitative" indicates that the knowledge is still not complete; although many properties, the ground state as well as the finite temperature behaviour and the phase transition from magnetic order at low temperatures to the paramagnetic state at high temperatures, can be explained in a coherent way, a quantitative description still is not fully achieved. It is certainly appropriate to summarize the developments of the last 15 years and the present-day understanding of the field, this is the aim of this Topics volume. The form chosen is a collection of reviews, written by prominent scientists who themselves contributed decisively to the progress. Scientists with a general interest in the field as well as specialists and active researchers in metallic magnetism should be able to profit from the two-volume treatment. The subjects not covered extensively in the present first volume (in particular neutron scattering and electronic structure properties) will make up the second volume.
Book Synopsis Magnetic Properties and Electronic Structure of Rare-earth-transition Metal Inter-metallic Compounds by : Antônio Augusto Gomes
Download or read book Magnetic Properties and Electronic Structure of Rare-earth-transition Metal Inter-metallic Compounds written by Antônio Augusto Gomes and published by . This book was released on 1972 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic and Magnetic Properties of Metals and Ceramics by : K. H. J. Buschow
Download or read book Electronic and Magnetic Properties of Metals and Ceramics written by K. H. J. Buschow and published by . This book was released on 1992 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
