Crystallography And Magnetism Of Magnetocalorically Important Ni Mn X Based Heusler Alloys

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Crystallography and Magnetism of Magnetocalorically Important Ni-Mn-X Based Heusler Alloys

Author : Amila S. B. Madiligama
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Crystallography and Magnetism of Magnetocalorically Important Ni-Mn-X Based Heusler Alloys by : Amila S. B. Madiligama

Download or read book Crystallography and Magnetism of Magnetocalorically Important Ni-Mn-X Based Heusler Alloys written by Amila S. B. Madiligama and published by . This book was released on 2016 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ni-Mn-X Heusler alloys, demonstrating strong coupling between crystalline structure and magnetic state, were studied. They undergo field-induced, first-order transformations from a low symmetry martensite to a high-symmetry austenitic phase around room temperature. The substantial difference between the entropies of the two phases results in a large adiabatic temperature change, called "Giant Magnetocaloric Effect (GMCE)". Consequently, these alloys are promising refrigerants for near-room temperature cooling systems. This magnetic cooling is an energy-efficient and eco-friendly technology. Crystalline structures and magnetic states of these alloys, which determine their magnetocaloric performances, highly depend on their composition. To examine new paths to optimize their magnetocaloric performances, this research is focused on the crystalline and magnetic behavior of a series of alloys under various experimental conditions (one Ni-Mn-In, three Ni-Mn-In-Co and two Ni-Mn-Ga). Additionally, phase transformation temperatures, co-existing phases, site occupancies, the effects of a magnetic field on the phase transformation temperature and hysteresis were also studied. Their chemical compositions were determined by the RBS and EDS techniques. Rietveld refinements of diffraction data, reveals austenitic structure of all these alloys is cubic L21 (Fm3̅ m) and upon cooling, they transform into monoclinic martensitic phases (P 1 2/m 1 space group). Martensitic phase, except for Ni-Mn-Ga, is a mixture of two modulated monoclinic phases: either 5M & 7M or 6M & 8M. Ni-Mn-Ga alloys undergo inter-martensitic phase transformations from 7M modulated monoclinic phase to a non-modulated L10 tetragonal phase, upon cooling. Magnetic nature was determined by thermomagnetic, AC-susceptibility, and neutron diffraction. The austenitic phase of the Ni-Mn-In and Ni-Mn-In-Co alloys is ferromagnetic due to strong ferromagnetic interactions between Mn(4a-sites) and Mn(4b-sites). In the Ni-Mn-In-Co alloys, the interactions between Co atoms enhance the ferromagnetism of the austenite. The Ni- Mn-Ga alloys in the current study are paramagnetic in the austenitic phase and they order ferromagnetically in their martensitic phase. Magnetic interactions in the martensitic phase become complex with the variation of interatomic distances between magnetic atoms due to the modulations of the martensitic phase. Consequently, different magnetic natures, ferromagnetic, antiferromagnetic, and spin-glass-like are present in the martensitic phase. Both magnetic field and temperature drive the martensitic transformation. The hystereses associated with magnetic transformations are significantly higher than those of the crystalline transformations, and are approximately proportional to the square of the magnetic field. The hystereses associated with crystalline phase transformation have a minimum at a certain field. Because of the difference between the two transformations they merge only upon heating and under a certain magnetic field. In all studied martensitic transformations (i.e. upon cooling) the lattice entropy decreases. However, the effect is larger when the austenite's magnetic nature has higher entropy than the martensite does. Therefore, a magneto-structural transformation from antiferromagnetic martensite to cubic ferromagnetic austenite produces a large GMCE. However, it is vital to consider the thermal hysteresis losses associated with both phase transformations when calculating the GMCE.

Heusler Alloys

Author : Claudia Felser
Publisher : Springer
ISBN 13 : 3319214497
Total Pages : 492 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis Heusler Alloys by : Claudia Felser

Download or read book Heusler Alloys written by Claudia Felser and published by Springer. This book was released on 2015-11-12 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an overview of the physics of Heusler compounds ranging from fundamental properties of these alloys to their applications. Especially Heusler compounds as half-metallic ferromagnetic and topological insulators are important in condensed matter science due to their potential in magnetism and as materials for energy conversion. The book is written by world-leaders in this field. It offers an ideal reference to researchers at any level.

Publications of the National Institute of Standards and Technology ... Catalog

Author : National Institute of Standards and Technology (U.S.)
Publisher :
ISBN 13 :
Total Pages : 1162 pages
Book Rating : 4.3/5 (243 download)

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Book Synopsis Publications of the National Institute of Standards and Technology ... Catalog by : National Institute of Standards and Technology (U.S.)

Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1994 with total page 1162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Magnetic Properties of Metals and Alloys

Author : American Society for Metals
Publisher :
ISBN 13 :
Total Pages : 364 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Magnetic Properties of Metals and Alloys by : American Society for Metals

Download or read book Magnetic Properties of Metals and Alloys written by American Society for Metals and published by . This book was released on 1959 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Properties of Materials

Author : Robert E. Newnham
Publisher : Oxford University Press
ISBN 13 : 0198520751
Total Pages : 391 pages
Book Rating : 4.1/5 (985 download)

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Book Synopsis Properties of Materials by : Robert E. Newnham

Download or read book Properties of Materials written by Robert E. Newnham and published by Oxford University Press. This book was released on 2005 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crystals are sometimes called 'Flowers of the Mineral Kingdom'. In addition to their great beauty, crystals and other textured materials are enormously useful in electronics, optics, acoustics and many other engineering applications. This richly illustrated text describes the underlying principles of crystal physics and chemistry, covering a wide range of topics and illustrating numerous applications in many fields of engineering using the most important materials today. Tensors, matrices, symmetry and structure-property relationships form the main subjects of the book. While tensors and matrices provide the mathematical framework for understanding anisotropy, on which the physical and chemical properties of crystals and textured materials often depend, atomistic arguments are also needed to quantify the property coefficients in various directions. The atomistic arguments are partly based on symmetry and partly on the basic physics and chemistry of materials. After introducing the point groups appropriate for single crystals, textured materials and ordered magnetic structures, the directional properties of many different materials are described: linear and nonlinear elasticity, piezoelectricity and electrostriction, magnetic phenomena, diffusion and other transport properties, and both primary and secondary ferroic behavior. With crystal optics (its roots in classical mineralogy) having become an important component of the information age, nonlinear optics is described along with the piexo-optics, magneto-optics, and analogous linear and nonlinear acoustic wave phenomena. Enantiomorphism, optical activity, and chemical anisotropy are discussed in the final chapters of the book.

Magnetism and Structure in Functional Materials

Author : Antoni Planes
Publisher : Springer Science & Business Media
ISBN 13 : 3540316310
Total Pages : 261 pages
Book Rating : 4.5/5 (43 download)

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Book Synopsis Magnetism and Structure in Functional Materials by : Antoni Planes

Download or read book Magnetism and Structure in Functional Materials written by Antoni Planes and published by Springer Science & Business Media. This book was released on 2010-02-11 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetism and Structure in Functional Materials addresses three distinct but related topics: (i) magnetoelastic materials such as magnetic martensites and magnetic shape memory alloys, (ii) the magnetocaloric effect related to magnetostructural transitions, and (iii) colossal magnetoresistance (CMR) and related manganites. The goal is to identify common underlying principles in these classes of materials that are relevant for optimizing various functionalities. The emergence of apparently different magnetic/structural phenomena in disparate classes of materials clearly points to a need for common concepts in order to achieve a broader understanding of the interplay between magnetism and structure in this general class of new functional materials exhibiting ever more complex microstructure and function. The topic is interdisciplinary in nature and the contributors correspondingly include physicists, materials scientists and engineers. Likewise the book will appeal to scientists from all these areas.

Handbook of Magnetism and Magnetic Materials

Author : Michael Coey
Publisher : Springer
ISBN 13 : 9783030632083
Total Pages : 1679 pages
Book Rating : 4.6/5 (32 download)

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Book Synopsis Handbook of Magnetism and Magnetic Materials by : Michael Coey

Download or read book Handbook of Magnetism and Magnetic Materials written by Michael Coey and published by Springer. This book was released on 2021-11-19 with total page 1679 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook presents a comprehensive survey of magnetism and magnetic materials. The dramatic advances in information technology and electromagnetic engineering make it necessary to systematically review the approved key knowledge and summarize the state of the art in this vast field within one seminal reference work. The book thus delivers up-to-date and well-structured information on a wealth of topics encompassing all fundamental aspects of the underlying physics and materials science, as well as advanced experimental methodology and applications. It features coverage of the host of fascinating and complex phenomena that arise from the use of magnetic fields in e.g. chemistry and biology. Edited by two internationally renowned scholars and featuring authored chapters from leading experts in the field, Springer’s Handbook of Magnetism and Magnetic Materials is an invaluable source of essential reference information for a broad audience of students, researchers, and magnetism professionals.

Spintronics

Author : Claudia Felser
Publisher : Springer Science & Business Media
ISBN 13 : 9048138329
Total Pages : 379 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Spintronics by : Claudia Felser

Download or read book Spintronics written by Claudia Felser and published by Springer Science & Business Media. This book was released on 2013-03-20 with total page 379 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spintronics is an emerging technology exploiting the spin degree of freedom and has proved to be very promising for new types of fast electronic devices. Amongst the anticipated advantages of spintronics technologies, researchers have identified the non-volatile storage of data with high density and low energy consumption as particularly relevant. This monograph examines the concept of half-metallic compounds perspectives to obtain novel solutions and discusses several oxides such as perovskites, double perovskites and CrO2 as well as Heusler compounds. Such materials can be designed and made with high spin polarization and, especially in the case of Heusler compounds, many material-related problems present in current-day 3d metal systems, can be overcome. Spintronics: From Materials to Devices provides an insight into the current research on Heusler compounds and offers a general understanding of structure–property relationships, including the influence of disorder and correlations on the electronic structure and interfaces. Spintronics devices such as magnetic tunnel junctions (MTJs) and giant magnetoresistance (GMR) devices, with current perpendicular to the plane, in which Co2 based Heusler compounds are used as new electrode materials, are also introduced. From materials design by theoretical methods and the preparation and properties of the materials to the production of thin films and devices, this monograph represents a valuable guide to both novices and experts in the fields of Chemistry, Physics, and Materials Science.

The Magnetocaloric Effect and its Applications

Author : A.M. Tishin
Publisher : CRC Press
ISBN 13 : 1420033379
Total Pages : 489 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis The Magnetocaloric Effect and its Applications by : A.M. Tishin

Download or read book The Magnetocaloric Effect and its Applications written by A.M. Tishin and published by CRC Press. This book was released on 2016-04-19 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: The magnetocaloric effect describes the change in temperature of a magnetic material under adiabatic conditions through the application or removal of an external magnetic field. This effect is particularly pronounced at temperatures and fields corresponding to magnetic phase transitions, and it is a powerful and widely used tool for investigating t

Handbook of Spintronics

Author : Yongbing Xu
Publisher : Springer
ISBN 13 : 9789400768918
Total Pages : 0 pages
Book Rating : 4.7/5 (689 download)

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Book Synopsis Handbook of Spintronics by : Yongbing Xu

Download or read book Handbook of Spintronics written by Yongbing Xu and published by Springer. This book was released on 2015-10-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over two volumes and 1500 pages, the Handbook of Spintronics will cover all aspects of spintronics science and technology, including fundamental physics, materials properties and processing, established and emerging device technology and applications. Comprising 60 chapters from a large international team of leading researchers across academia and industry, the Handbook provides readers with an up-to-date and comprehensive review of this dynamic field of research. The opening chapters focus on the fundamental physical principles of spintronics in metals and semiconductors, including an introduction to spin quantum computing. Materials systems are then considered, with sections on metallic thin films and multilayers, magnetic tunnelling structures, hybrids, magnetic semiconductors and molecular spintronic materials. A separate section reviews the various characterisation methods appropriate to spintronics materials, including STM, spin-polarised photoemission, x-ray diffraction techniques and spin-polarised SEM. The third part of the Handbook contains chapters on the state of the art in device technology and applications, including spin valves, GMR and MTJ devices, MRAM technology, spin transistors and spin logic devices, spin torque devices, spin pumping and spin dynamics and other topics such as spin caloritronics. Each chapter considers the challenges faced by researchers in that area and contains some indications of the direction that future work in the field is likely to take. This reference work will be an essential and long-standing resource for the spintronics community.

Introduction to Magnetic Materials

Author : B. D. Cullity
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (963 download)

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Book Synopsis Introduction to Magnetic Materials by : B. D. Cullity

Download or read book Introduction to Magnetic Materials written by B. D. Cullity and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Solid State PhysicsMetastable, Spintronics Materials and Mechanics of Deformable Bodies

Author : Subbarayan Sivasankaran
Publisher : BoD – Books on Demand
ISBN 13 : 1838811648
Total Pages : 238 pages
Book Rating : 4.8/5 (388 download)

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Book Synopsis Solid State PhysicsMetastable, Spintronics Materials and Mechanics of Deformable Bodies by : Subbarayan Sivasankaran

Download or read book Solid State PhysicsMetastable, Spintronics Materials and Mechanics of Deformable Bodies written by Subbarayan Sivasankaran and published by BoD – Books on Demand. This book was released on 2020-05-27 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the recent evolution of solid-state physics, which is primarily dedicated to examining the behavior of solids at the atomic scale. It also presents various state-of-the-art reviews and original contributions related to solid-state sciences. The book consists of four sections, namely, solid-state behavior, metastable materials, spintronics materials, and mechanics of deformable bodies. The authors’ contributions relating to solid-state behavior deal with the performance of solid matters pertaining to quantum mechanics, physical metallurgy, and crystallography. The authors’ contributions relating to metastable materials demonstrate the behavior of amorphous/bulk metallic glasses and some nonequilibrium materials. The authors’ contributions relating to spintronic materials explain the principles and equations underlying the physics, transport, and dynamics of spin in solid-state systems. The authors’ contributions relating to the mechanics of deformable bodies deal with applications of numeric and analytic solutions/models for solid-state structures under deformation. Key Features:Issues in solid-state physics, Lagrangian quantum mechanics,Quantum and thermal behavior of HCP crystals,Thermoelectric properties of semiconductors,Bulk metallic glasses and metastable atomic density determination,Applications of spintronics and Heusler alloys, 2D elastostatic, mathematical modeling and dynamic stiffness methods on deformable bodies.

Magnetic Shape Memory Alloys

Author : Xuexi Zhang
Publisher : Springer Nature
ISBN 13 : 981166336X
Total Pages : 273 pages
Book Rating : 4.8/5 (116 download)

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Book Synopsis Magnetic Shape Memory Alloys by : Xuexi Zhang

Download or read book Magnetic Shape Memory Alloys written by Xuexi Zhang and published by Springer Nature. This book was released on 2021-11-14 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book systematically describes the fundamentals of Magnetic shape memory alloys (MSMAs), with an emphasis on low-dimensional structures such as foams, microwires and micro-particles. The respective chapters address basic concepts and theories, the fabrication of various architectures, microstructure tailoring, property optimization and cutting-edge applications. Taken together, they provide a clear understanding of the correlation between processing and the microstructural properties of MSMAs, which are illustrated in over two hundred figures and schematics. Given its scope and format, the book offers a valuable resource for a broad readership in various fields of materials science and engineering, especially for researchers, students and engineers.

Handbook of Magnetic Materials

Author : Ekkes H. Brück
Publisher : Elsevier
ISBN 13 : 0128210249
Total Pages : 216 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Handbook of Magnetic Materials by : Ekkes H. Brück

Download or read book Handbook of Magnetic Materials written by Ekkes H. Brück and published by Elsevier. This book was released on 2020-11-29 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Magnetic Materials, Volume 29, highlights new advances in the field, with this new volume presenting interesting chapters written by an international board of authors on topics such as spin-orbit torque. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in the Handbook of Magnetic Materials series

Theory of Itinerant Electron Magnetism

Author : Jürgen Kübler
Publisher : Oxford University Press
ISBN 13 : 0191565423
Total Pages : 494 pages
Book Rating : 4.1/5 (915 download)

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Book Synopsis Theory of Itinerant Electron Magnetism by : Jürgen Kübler

Download or read book Theory of Itinerant Electron Magnetism written by Jürgen Kübler and published by Oxford University Press. This book was released on 2017-03-23 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, in the broadest sense, is an application of quantum mechanics and statistical mechanics to the field of magnetism. Under certain well described circumstances, an immensely large number of electrons moving in the solid state of matter will collectively produce permanent magnetism. Permanent magnets are of fundamental interest, and magnetic materials are also of great practical importance as they provide a large field of technological applications. The physical details describing the many electron problem of magnetism are presented in this book on the basis of the local density functional approximation. The emphasis is on realistic magnets, for which the equations describing the many electron problem can only be solved by using computers. The great, recent and continuing improvements of computers are, to a large extent, responsible for the progress in the field. Along with a detailed introduction to the density functional theory, this book presents representative computational methods and provides the reader with a complete computer programme for the determination of the electronic structure of a magnet on a PC. A large part of the book is devoted to a detailed treatment of the connections between electronic properties and magnetism, and how they differ in the various known magnetic systems. Current trends are exposed and explained for a large class of alloys and compounds. The modern field of artificially layered systems - known as multilayers - and their industrial applications are dealt with in detail. Finally, an attempt is made to relate the rich thermodynamic properties of magnets to the ab initio results originating from the electronic structure.

Ferromagnetic Materials

Author : E. P. Wohlfarth
Publisher :
ISBN 13 :
Total Pages : 718 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Ferromagnetic Materials by : E. P. Wohlfarth

Download or read book Ferromagnetic Materials written by E. P. Wohlfarth and published by . This book was released on 1995 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Volume 20 of the Handbook of Magnetic Materials, as the preceding volumes, has a dual purpose. As a textbook it is intended to help those who wish to be introduced to a given topic in the field of magnetism without the need to read the vast amount of literature published. As a work of reference it is intended for scientists active in magnetism research. To this dual purpose, Volume 20 is composed of topical review articles written by leading authorities. In each of these articles an extensive description is given in graphical as well as in tabular form, much emphasis being placed on the discussion of the experimental material in the framework of physics, chemistry and material science. It provides readers with novel trends and achievements in magnetism"--Publisher's note.

Alloys and Compounds of d-Elements with Main Group Elements

Author :
Publisher : Springer
ISBN 13 : 9783540632788
Total Pages : 415 pages
Book Rating : 4.6/5 (327 download)

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Book Synopsis Alloys and Compounds of d-Elements with Main Group Elements by :

Download or read book Alloys and Compounds of d-Elements with Main Group Elements written by and published by Springer. This book was released on 2001-07-24 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 32 of Group III is a supplement to volume III/19 and deals with the magnetic properties of metals, alloys and metallic compounds which contain at least one transition element. The present subvolume III/32C provides comprehensive and evaluated data on magnetic properties of alloys and compounds of d-elements with main group elements published mainly in the previous decade.