Quantum Theory of Magnetism : Magnetic Properties of Materials

This book provides a unified description of magnetic phenomena through means of the generalized susceptibility. The book begins by discussing the general properties of the susceptibility, its complex nature, its symmetry, and its relation to magnetic fluctuations.Next, the quantum basis of magnetic phenomena is established. The bulk of the book builds on this theoretical foundation to calculate the magnetic response to spatial and time-varying magnetic fields. This provides a natural way of thinking about long-range order, critical phenomena, resonance, etc. A new chapter is included which deals with the magnetic properties of thin film magnetic structures which have many potential applications. 'Quantum Theory of Magnetism'is the only book that deals with the phenomenon of magnetism from the point of view of'linear response'. That is, how does a magnetic material respond when excited by a magnetic field? That field may be uniform, or spatially varying, static or time dependent. Previous editions have dealt primarily with the magnetic response. This edition incorporates the resistive response of magnetic materials as well. It also includes problems to test the reader's (or student's) comprehension. The rationale for a book on magnetism is as valid today as it was when the first two editions of Quantum Theory of Magnetism were published. Magnetic phenomena continue to be discovered with deep scientific implications and novel applications. Since the Second Edition, for example, Giant Magneto Resistance (GMR) was discovered and the new field of'spintronics'is currently expanding. Not only do these phenomena rely on the concepts presented in this book, but magnetic propertiesare often an important clue to our understanding of new materials (e.g., high-temperature superconductors). Their magnetic properties, studied by susceptibility measurements, nuclear magnetic resonance, neutron scattering, etc. have provided insight to the superconductivity state.This updated edition offers revised emphasis on some material as a result of recent developments and includes new material, such as an entire chapter on thin film magnetic multilayers. Researchers and students once again have access to an up-to-date classic reference on magnetism, the key characteristic of many modern materials. Quantum Theory Of Magnetism Is The Only Book That Deals With The Phenomenon Of Magnetism From The Point Of View Of Linear Response. That Is, How Does A Magnetic Material Respond When Excited By A Magnetic Field? That Field May Be Uniform, Or Spatially Varying, Static Or Time Dependent. Previous Editions Have Dealt Primarily With The Magnetic Response. This Edition Incorporates The Resistive Response Of Magnetic Materials As Well. It Also Includes Problems To Test The Reader's (or Student's) Comprehension. The Rationale For A Book On Magnetism Is As Valid Today As It Was When The First Two Editions Of Quantum Theory Of Magnetism Were Published. Magnetic Phenomena Continue To Be Discovered With Deep Scientific Implications And Novel Applications. Since The Second Edition, For Example, Giant Magneto Resistance (gmr) Was Discovered And The New Field Of Spintronics Is Currently Expanding. Not Only Do These Phenomena Rely On The Concepts Presented In This Book, But Magnetic Properties Are Often An Important Clue To Our Understanding Of New Materials (e.g., High-temperature Superconductors). Their Magnetic Properties, Studied By Susceptibility Measurements, Nuclear Magnetic Resonance, Neutron Scattering, Etc. Have Provided Insight To The Superconductivity State.this Updated Edition Offers Revised Emphasis On Some Material As A Result Of Recent Developments And Includes New Material, Such As An Entire Chapter On Thin Film Magnetic Multilayers. Researchers And Students Once Again Have Access To An Up-to-date Classic Reference On Magnetism, The Key Characteristic Of Many Modern Materials. This book provides a unified description of magnetic phenomena through means of the generalized susceptibility. The book begins by discussing the general properties of the susceptibility, its complex nature, its symmetry, and its relation to magnetic fluctuations. Next, the quantum basis of magnetic phenomena is established. The bulk of the book builds on this theoretical foundation to calculate the magnetic response to spatial and time-varying magnetic fields. This provides a natural way of thinking about long-range order, critical phenomena, resonance, etc. A new chapter is included which deals with the magnetic properties of thin film magnetic structures which have many potential applications The Magnetic Susceptibility -- The Magnetic Hamiltonian -- The Static Susceptibility Of Noninteracting Systems -- The Static Suceptibility Of Interacting Systems : Local Moments -- The Static Susceptibility Of Interacting Systems : Metals -- The Dynamic Susceptibility Of Weakly Interacting Systems : Local Moments -- The Dynamic Susceptibility Of Weakly Interacting Systems : Metals -- The Dynamic Susceptibility Of Strongly Interacting Systems -- Thin Film Systems -- Neutron Scattering. Robert M. White. Includes Bibliographical References (p. [345]-354) And Index. This is one of the best textbooks on magnetism, which introduces the advanced quantum approach to magnetism very accessibly, starting from basic ideas and relations. It presents also current problems of magnetism, e.q., spin Hall effect.