Spin Fluctuations in Itinerant Electron Magnetism

Spin Fluctuations in Itinerant Electron Magnetism

Author: Toru Moriya

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 253

ISBN-13: 3642824994

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Ferromagnetism of metallic systems, especially those including transition metals, has been a controversial subject of modern science for a long time. This controversy sterns from the apparent dual character of the d-electrons responsible for magnetism in transition metals, i.e., they are itinerant elec trons described by band theory in their ground state, while at finite tem peratures they show various properties that have long been attributed to a system consisting of local magnetic moments. The most familiar example of these properties is the Curie-Weiss law of magnetic susceptibility obeyed by almost all ferromagnets above their Curie temperatures. At first the problem seemed to be centered around whether the d-elec trons themselves are localized or itinerant. This question was settled in the 1950s and early 1960s by various experimental investigations, in particular by observations of d-electron Fermi surfaces in ferromagnetic transition metals. These observations are generally consistent with the results of band calculations. Theoretical investigations since then have concentrated on explaining this dual character of d-electron systems, taking account of the effects of electron-electron correlations in the itinerant electron model. The problem in physical terms is to study the spin density fluctuati·ons, which are ne glected in the mean-field or one-electron theory, and their influence on the physical properties.


Book Synopsis Spin Fluctuations in Itinerant Electron Magnetism by : Toru Moriya

Download or read book Spin Fluctuations in Itinerant Electron Magnetism written by Toru Moriya and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferromagnetism of metallic systems, especially those including transition metals, has been a controversial subject of modern science for a long time. This controversy sterns from the apparent dual character of the d-electrons responsible for magnetism in transition metals, i.e., they are itinerant elec trons described by band theory in their ground state, while at finite tem peratures they show various properties that have long been attributed to a system consisting of local magnetic moments. The most familiar example of these properties is the Curie-Weiss law of magnetic susceptibility obeyed by almost all ferromagnets above their Curie temperatures. At first the problem seemed to be centered around whether the d-elec trons themselves are localized or itinerant. This question was settled in the 1950s and early 1960s by various experimental investigations, in particular by observations of d-electron Fermi surfaces in ferromagnetic transition metals. These observations are generally consistent with the results of band calculations. Theoretical investigations since then have concentrated on explaining this dual character of d-electron systems, taking account of the effects of electron-electron correlations in the itinerant electron model. The problem in physical terms is to study the spin density fluctuati·ons, which are ne glected in the mean-field or one-electron theory, and their influence on the physical properties.


Spin Fluctuation Theory of Itinerant Electron Magnetism

Spin Fluctuation Theory of Itinerant Electron Magnetism

Author: Yoshinori Takahashi

Publisher: Springer

Published: 2013-04-09

Total Pages: 190

ISBN-13: 364236666X

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This volume shows how collective magnetic excitations determine most of the magnetic properties of itinerant electron magnets. Previous theories were mainly restricted to the Curie-Weiss law temperature dependence of magnetic susceptibilities. Based on the spin amplitude conservation idea including the zero-point fluctuation amplitude, this book shows that the entire temperature and magnetic field dependence of magnetization curves, even in the ground state, is determined by the effect of spin fluctuations. It also shows that the theoretical consequences are largely in agreement with many experimental observations. The readers will therefore gain a new comprehensive perspective of their unified understanding of itinerant electron magnetism.


Book Synopsis Spin Fluctuation Theory of Itinerant Electron Magnetism by : Yoshinori Takahashi

Download or read book Spin Fluctuation Theory of Itinerant Electron Magnetism written by Yoshinori Takahashi and published by Springer. This book was released on 2013-04-09 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume shows how collective magnetic excitations determine most of the magnetic properties of itinerant electron magnets. Previous theories were mainly restricted to the Curie-Weiss law temperature dependence of magnetic susceptibilities. Based on the spin amplitude conservation idea including the zero-point fluctuation amplitude, this book shows that the entire temperature and magnetic field dependence of magnetization curves, even in the ground state, is determined by the effect of spin fluctuations. It also shows that the theoretical consequences are largely in agreement with many experimental observations. The readers will therefore gain a new comprehensive perspective of their unified understanding of itinerant electron magnetism.


Itinerant Electron Magnetism: Fluctuation Effects

Itinerant Electron Magnetism: Fluctuation Effects

Author: Dieter Wagner

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 455

ISBN-13: 940115080X

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A summary of recent developments in theoretical and experimental studies of fluctuation effects in itinerant electron magnets, focusing on novel physical phenomena: soft-mode spin fluctuations and zero-point effects, strong spin anharmonicity, magnetic frustrations in metals, fluctuation effects in Invar alloys and low-dimensional systems. All of these may be important for novel high-technology applications.


Book Synopsis Itinerant Electron Magnetism: Fluctuation Effects by : Dieter Wagner

Download or read book Itinerant Electron Magnetism: Fluctuation Effects written by Dieter Wagner and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: A summary of recent developments in theoretical and experimental studies of fluctuation effects in itinerant electron magnets, focusing on novel physical phenomena: soft-mode spin fluctuations and zero-point effects, strong spin anharmonicity, magnetic frustrations in metals, fluctuation effects in Invar alloys and low-dimensional systems. All of these may be important for novel high-technology applications.


Effect of Spin Fluctuations on Itinerant Electron Ferromagnetism

Effect of Spin Fluctuations on Itinerant Electron Ferromagnetism

Author: T. Moriya

Publisher:

Published: 1972

Total Pages: 48

ISBN-13:

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Book Synopsis Effect of Spin Fluctuations on Itinerant Electron Ferromagnetism by : T. Moriya

Download or read book Effect of Spin Fluctuations on Itinerant Electron Ferromagnetism written by T. Moriya and published by . This book was released on 1972 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:


Theory of Itinerant Electron Magnetism

Theory of Itinerant Electron Magnetism

Author: Jürgen Kübler

Publisher: Oxford University Press

Published: 2000-08-17

Total Pages: 444

ISBN-13: 9780198500285

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This book is an application of quantum mechanics and statistical mechanics to the field of magnetism. 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. The book also relates the rich thermodynamic properties of magnets to the ab initio results originating from the electronic structure.


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 2000-08-17 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an application of quantum mechanics and statistical mechanics to the field of magnetism. 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. The book also relates the rich thermodynamic properties of magnets to the ab initio results originating from the electronic structure.


Effect of Spin Fluctuations on the Electric Field Gradient in Itinerant Electron Magnets

Effect of Spin Fluctuations on the Electric Field Gradient in Itinerant Electron Magnets

Author: Yoshinori Takahashi

Publisher:

Published: 1977

Total Pages: 27

ISBN-13:

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Book Synopsis Effect of Spin Fluctuations on the Electric Field Gradient in Itinerant Electron Magnets by : Yoshinori Takahashi

Download or read book Effect of Spin Fluctuations on the Electric Field Gradient in Itinerant Electron Magnets written by Yoshinori Takahashi and published by . This book was released on 1977 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:


Itinerant-electron Magnetism

Itinerant-electron Magnetism

Author:

Publisher:

Published: 1977

Total Pages: 0

ISBN-13:

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Book Synopsis Itinerant-electron Magnetism by :

Download or read book Itinerant-electron Magnetism written by and published by . This book was released on 1977 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:


Creative Complex Systems

Creative Complex Systems

Author: Kazuo Nishimura

Publisher: Springer Nature

Published: 2021-10-26

Total Pages: 427

ISBN-13: 9811644578

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In recent years, problems such as environmental and economic crises and pandemics caused by new viruses have been occurring on a global scale. Globalization brings about benefits, but it can increase the potential risks of “systemic problems”, leading to system-wide disruptions. The coronavirus pandemic, declared on March 11, 2020, by the World Health Organization, has revealed social disparities in the form of a higher risk of death for people of low-socioeconomic status and has caused massive destruction of the economy and of globalization itself. Extensive efforts to cope with these challenges have often led to the emergence of additional problems due to the chain of hidden causation. What can be done to protect against such emerging challenges? Despite the resulting complexity, once these individual problems are considered as different aspects of a single whole, seemingly contradictory issues can become totally understandable, as they can be integrated into a single coherent framework. This is the integrationist approach in contrast to the reductionist approach. Situations of this kind are truly relevant to understanding the question, “What are creative complex systems?” This book features contributions by members and colleagues of the Kyoto University International Research Unit of Integrated Complex System Science. It broadens our outlook from the traditional view of stability, in which global situations are eventually stabilized after the impact of destruction, to “creative” complex systems.


Book Synopsis Creative Complex Systems by : Kazuo Nishimura

Download or read book Creative Complex Systems written by Kazuo Nishimura and published by Springer Nature. This book was released on 2021-10-26 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, problems such as environmental and economic crises and pandemics caused by new viruses have been occurring on a global scale. Globalization brings about benefits, but it can increase the potential risks of “systemic problems”, leading to system-wide disruptions. The coronavirus pandemic, declared on March 11, 2020, by the World Health Organization, has revealed social disparities in the form of a higher risk of death for people of low-socioeconomic status and has caused massive destruction of the economy and of globalization itself. Extensive efforts to cope with these challenges have often led to the emergence of additional problems due to the chain of hidden causation. What can be done to protect against such emerging challenges? Despite the resulting complexity, once these individual problems are considered as different aspects of a single whole, seemingly contradictory issues can become totally understandable, as they can be integrated into a single coherent framework. This is the integrationist approach in contrast to the reductionist approach. Situations of this kind are truly relevant to understanding the question, “What are creative complex systems?” This book features contributions by members and colleagues of the Kyoto University International Research Unit of Integrated Complex System Science. It broadens our outlook from the traditional view of stability, in which global situations are eventually stabilized after the impact of destruction, to “creative” complex systems.


Function and Regulation of Cellular Systems

Function and Regulation of Cellular Systems

Author: Andreas Deutsch

Publisher: Springer Science & Business Media

Published: 2004-02-20

Total Pages: 688

ISBN-13: 9783764369255

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Current biological research demands the extensive use of sophisticated mathematical methods and computer-aided analysis of experiments and data. This highly interdisciplinary volume focuses on structural, dynamical and functional aspects of cellular systems and presents corresponding experiments and mathematical models. The book may serve as an introduction for biologists, mathematicians and physicists to key questions in cellular systems which can be studied with mathematical models. Recent model approaches are presented with applications in cellular metabolism, intra- and intercellular signaling, cellular mechanics, network dynamics and pattern formation. In addition, applied issues such as tumor cell growth, dynamics of the immune system and biotechnology are included.


Book Synopsis Function and Regulation of Cellular Systems by : Andreas Deutsch

Download or read book Function and Regulation of Cellular Systems written by Andreas Deutsch and published by Springer Science & Business Media. This book was released on 2004-02-20 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current biological research demands the extensive use of sophisticated mathematical methods and computer-aided analysis of experiments and data. This highly interdisciplinary volume focuses on structural, dynamical and functional aspects of cellular systems and presents corresponding experiments and mathematical models. The book may serve as an introduction for biologists, mathematicians and physicists to key questions in cellular systems which can be studied with mathematical models. Recent model approaches are presented with applications in cellular metabolism, intra- and intercellular signaling, cellular mechanics, network dynamics and pattern formation. In addition, applied issues such as tumor cell growth, dynamics of the immune system and biotechnology are included.


Itinerant-electron Magnetism

Itinerant-electron Magnetism

Author: R. D. Lowde

Publisher: North-Holland

Published: 1977

Total Pages: 364

ISBN-13:

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Book Synopsis Itinerant-electron Magnetism by : R. D. Lowde

Download or read book Itinerant-electron Magnetism written by R. D. Lowde and published by North-Holland. This book was released on 1977 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: