Nanocrystalline Fe-Pt Alloys
Nanocrystalline Fe-Pt Alloys

Author: Julia V. Lyubina

Publisher: Cuvillier Verlag

Published: 2006

Total Pages: 20

ISBN-13: 3867272336

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This work has been devoted to the study of phase transformations involving chemical ordering and magnetic properties evolution in bulk Fe-Pt alloys composed of nanometer-sized grains. A comprehensive study of phase transformations and ordering in Fe-Pt alloys is performed by a combination of in-situ neutron powder diffraction and thermal analysis. The dependence of ordering processes on the alloy composition and initial microstructure (homogeneous A1 phase or multilayer-type) is established. Through the use of mechanical alloying and subsequent heat treatment it has been possible to achieve the formation of chemically highly ordered L10 FePt and, in the case of the Fe-rich and Pt-rich compositions, L12 Fe3Pt and FePt3 phases, respectively. Whereas in Pt-rich alloys the decoupling effect of the FePt3 phase leads to coercivity improvement, in Fe-rich nanocomposites a peculiar nanometer scale multilayer structure gives rise to remanence enhancement due to large effects of exchange interactions between the crystallites of the phases. The structure, magnetic properties and magnetisation reversal processes of these alloys are investigated. Experimentally observed phenomena are understood on the basis of a simple two-particle interaction model. Neutron diffraction has also been used for the investigation of the magnetic structure of ordered and partially ordered nanocrystalline Fe-Pt alloys. It has been shown that the magnetic moment of Fe atoms in L10-type Fe Pt alloys is sensitive to the compositional order. The results are compared to density functional calculations.

Handbook of Magnetic Materials
Handbook of Magnetic Materials

Author: K.H.J. Buschow

Publisher: Elsevier

Published: 2011-03-02

Total Pages: 456

ISBN-13: 0444537805

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Volume 19 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 19 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. Composed of topical review articles written by leading authorities Intended to be of assistance to those who wish to be introduced to a given topic in the field of magnetism As a work of reference it is intended for scientists active in magnetism research Provide the readership with novel trends and achievements in magnetism

Metallic Glasses and Their Composites
Metallic Glasses and Their Composites

Author: D.V. Louzguine

Publisher: Materials Research Forum LLC

Published: 2018-01-02

Total Pages: 336

ISBN-13: 1945291435

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The formation of metallic glasses and dual-phase composite/hybrid materials is reviewed, as well as the glass transition process and the resulting structural phenomena. These materials exhibit high strength, extreme hardness, good wear resistance and large elastic deformation. Due to their excellent structural, functional, magnetic, chemical and biological properties metallic glasses are suitable for a great many applications, including in such areas as microelectromechanical devices, pressure sensors, orthopaedic screws and precision surgical instruments. Metallic Glasses, Metallic Glass Composites, Crystal/Glass Transition, Nano-Crystallization, Phase Separations, Supercooled Liquids, Glassy Nanocomposites, Nanoscale Quasicrystals, Mechanical Properties, Nanoscale Wear Resistance, Bauschinger Effect, Cryogenic Temperature, Porous Glasses, Nanocomposite Alloys, Soft Magnetic Alloys, Hard Magnetic Alloys, Magnetocaloric Effect, Corrosion Resistant Alloys, Surface Oxides, Catalysts

Electrochemical Methods of Nanostructure Preparation
Electrochemical Methods of Nanostructure Preparation

Author: László Péter

Publisher: Springer Nature

Published: 2021-04-24

Total Pages: 544

ISBN-13: 3030691179

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This book summarizes the electrochemical routes of nanostructure preparation in a systematic and didactic manner. It provides a comprehensive overview of electrodeposition, anodization, carbon nanotube preparation and other methods of nanostructure fabrication, combining essential information on the physical background of electrochemistry with materials science aspects of the field. The book includes a brief introduction to general electrochemistry with an emphasis on physico-chemical aspects, followed by a description of the sample preparation methods. In each chapter, an overview of the particular method is accompanied by a discussion of the relevant physical or chemical properties of the materials, including magnetic, mechanical, optical, catalytic, sensoric and other features. While some preparation methods are discussed in connection with the theories of physical electrochemistry (e.g. electrodeposition), the book also covers methods that are more heuristic but nonetheless utilize electric current (e.g. anodization of porous alumina or synthesis of carbon nanotubes by means of electric arc discharge).

Multiphase Polymer Systems
Multiphase Polymer Systems

Author: Andreea Irina Barzic

Publisher: CRC Press

Published: 2016-09-19

Total Pages: 384

ISBN-13: 149875564X

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Phase morphology in multicomponent polymer-based systems represents the main physical characteristic that allows for control of the material design and implicitly the development of new plastics. Emphasizing properties of these promising new materials in both solution and solid phase, this book describes the preparation, processing, properties, and practical implications of advanced multiphase systems from macro to nanoscales. It covers a wide range of systems including copolymers, polymer blends, polymer composites, gels, interpenetrating polymers, and layered polymer/metal structures, describing aspects of polymer science, engineering, and technology. The book analyzes experimental and theoretical aspects regarding the thermal and electrical transport phenomena and magnetic properties of crucial importance in advanced technologies. It reviews the most recent advances concerning morphological, rheological, interfacial, physical, fire-resistant, thermophysical, and biomedical properties of multiphase polymer systems. Concomitantly the book deals with basic investigation techniques that are sensitive in elucidating the features of each phase. It also discusses the latest research trends that offer new solutions for advanced bio- and nanotechnologies. Introduces an overview of recent studies in the area of multiphase polymer systems, their micro- and nanostructural evolutions in advanced technologies, and provides future outlooks, new challenges and opportunities. Discusses multicomponent structures that offer enhanced physical, mechanical, thermal, electrical, magnetic, and optical properties adapted to current requirements of modern technologies. Covers a wide range of materials, such as composites, blends, alloys, gels and interpenetrating polymer networks. Presents new strategies for controlling the micro- and nanomorphology and the mechanical properties of multiphase polymeric materials. Describes different applications of multiphase polymeric materials in various fields, including automotive, aeronautics and space industry, displays, and medicine.

Principles of Nanomagnetism
Principles of Nanomagnetism

Author: Alberto P. Guimarães

Publisher: Springer

Published: 2017-07-10

Total Pages: 335

ISBN-13: 3319594095

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The second edition of this book on nanomagnetism presents the basics and latest studies of low-dimensional magnetic nano-objects. It highlights the intriguing properties of nanomagnetic objects, such as thin films, nanoparticles, nanowires, nanotubes, nanodisks and nanorings as well as novel phenomena like spin currents. It also describes how nanomagnetism was an important factor in the rapid evolution of high-density magnetic recording and is developing into a decisive element of spintronics. Further, it presents a number of biomedical applications. With exercises and solutions, it serves as a graduate textbook.

Properties and Applications of Nanocrystalline Alloys from Amorphous Precursors
Properties and Applications of Nanocrystalline Alloys from Amorphous Precursors

Author: Bogdan Idzikowski

Publisher: Springer Science & Business Media

Published: 2005-07-18

Total Pages: 453

ISBN-13: 1402029659

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Metallic (magnetic and non-magnetic) nanocrystalline materials have been known for over ten years but only recent developments in the research into those complex alloys and their metastable amorphous precursors have created a need to summarize the most important accomplishments in the field. This book is a collection of articles on various aspects of metallic nanocrystalline materials, and an attempt to address this above need. The main focus of the papers is put on the new issues that emerge in the studies of nanocrystalline materials, and, in particular, on (i) new compositions of the alloys, (ii) properties of conventional nanocrystalline materials, (iii) modeling and simulations, (iv) preparation methods, (v) experimental techniques of measurements, and (vi) different modern applications. Interesting phenomena of the physics of nanocrystalline materials are a consequence of the effects induced by the nanocrystalline structure. They include interface physics, the influence of the grain boundaries, the averaging of magnetic anisotropy by exchange interactions, the decrease in exchange length, and the existence of a minimum two-phase structure at the atomic scale. Attention is also paid to the special character of the local atomic ordering and to the corresponding interatomic bonding as well as to anomalies and particularities of electron density distributions, and to the formation of metastable, nanocrystalline (or quasi-crystalline) phases built from exceptionally small grains with special properties. Another important focus of attention are new classes of materials which are not based on new compositions, but rather on the original and special crystalline structure in the nanoscale.

Magnetic Nanoparticles
Magnetic Nanoparticles

Author: Sergey P. Gubin

Publisher: John Wiley & Sons

Published: 2009-11-18

Total Pages: 484

ISBN-13: 352762757X

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This interdisciplinary approach to the topic brings together reviews of the physics, chemistry, fabrication and application of magnetic nanoparticles and nanostructures within a single cover. With its discussion of the basics as well as the most recent developments, and featuring many examples of practical applications, the result is both a clear and concise introduction to the topic for beginners and a guide to relevant comprehensive physical phenomena and essential technological applications for experienced researchers.

Nanoscience: Volume 6
Nanoscience: Volume 6

Author: Neerish Revaprasadu

Publisher: Royal Society of Chemistry

Published: 2020-05-21

Total Pages: 188

ISBN-13: 1788016939

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The field of nanoscience continues to grow and, with such a vast landscape of material, careful distillation of the most important discoveries will help researchers find the key information they require. Nanoscience provides a critical and comprehensive assessment of the most recent research and opinion from across the globe. Topics covered in this volume include metal halide perovskite nanomaterials, properties and applications, nanoparticles and nanocomposites for new permanent magnets and graphene-based materials for energy conversion applications. Anyone practising in any nano-allied field, or wishing to enter the nano-world will benefit from this resource, presenting the current thought and applications of nanoscience.

Nanoscience
Nanoscience

Author: Neerish Revaprasadu

Publisher: Royal Society of Chemistry

Published: 2020-05-20

Total Pages: 188

ISBN-13: 1788017056

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The field of nanoscience continues to grow and, with such a vast landscape of material, careful distillation of the most important discoveries will help researchers find the key information they require. Nanoscience provides a critical and comprehensive assessment of the most recent research and opinion from across the globe. Topics covered in this volume include metal halide perovskite nanomaterials, properties and applications, nanoparticles and nanocomposites for new permanent magnets and graphene-based materials for energy conversion applications. Anyone practising in any nano-allied field, or wishing to enter the nano-world will benefit from this resource, presenting the current thought and applications of nanoscience.