Introduction to Magnetism and Magnetic Materials
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1 Introduction to Magnetism and Magnetic Materials Second edition David Jiles Ames Laboratory, US Department of Energy Department of Materials Science and Engineering and Department of Electrical and Computer Engineering, Iowa State Universe, Arnes, Iowa, USA CHAPMAN & HALL/CRC A CRC Press Company Boca Raton London New York Washington, D.C.
2 Contents Preface to the first edition Preface to the second edition Foreword Acknowledgements Glossary of symbols ST units, symbols and dimensions Values of selected physical constants vii ix xi xvii xxiii xxix xxxi Part 1 Electromagnetism magnetic phenomena on the macroscopic scale 1 1 Magnetic fields The magnetic field Magnetic induction Magnetic field calculations 18 References 32 Further reading 33 Exercises 33 2 Magnetization and magnetic moment Magnetic moment Magnetic poles and Amp8rian bound currents Magnetization Magnetic circuits and demagnetizing field Penetration of alternating magnetic fields into materials 57 References 61 Further reading 61 Exercises 61 3 Magnetic measurements Induction methods Force methods Methods depending on changes in material properties SQUIDS 83
3 xiv Contents References 86 Further reading 86 Exercises 86 4 Magnetic materials Classification of magnetic materials Magnetic properties of ferromagnets Different types of ferromagnetic materials for applications Paramagnetism and diamagnetism 103 References 108 Further reading 109 Exercises Magnetic properties Hysteresis and related properties The Barkhausen effect and related phenomena Magnetostriction Magnetoresistance 128 References 129 Further reading 130 Exercises 130 Part 2 Magnetism in materials magnetic phenomena an the microscopic scale Magnetic domains Development of domain theory Energy considerations and domain patterns 146 References 153 Further reading 154 Exercises Domain walls Properties of domain boundaries Domain-wall motion 168 References 175 Further reading 176 Exercises Domain processes Reversible and irreversible domain processes Determination of magnetization curves from pinning models Theory of ferromagnetic hysteresis Dynamics of domain magnetization processes 205
4 Contents xv References 212 Further reading 214 Exercises Magnetic order and critical phenomena Theories of paramagnetism and diamagnetism Theories of ordered magnetism Magnetic structure 239 References 258 Further reading 260 Exercises Electronic magnetic moments Classical model of magnetic moments of electrons Quantum mechanical model of magnetic moments of electrons Magnetic properties of free atoms 280 References 288 Further reading 289 Exercises Quantum theory of magnetism Electron electron interactions The localized electron theory The itinerant electron theory 309 References 319 Further reading 320 Exercises 320 Part 3 Magnetics technological applications Soft magnetic materials Properties and applications Materials for a.c. applications Materials for d.c. applications Materials for magnetic shielding 356 References 359 Further reading Hard magnetic materials 13.1 Properties and applications 13.2 Permanent magnet materials References Further reading
5 xvi Contents 14 Magnetic recording Magnetic recording media Recording heads and the recording process Modeling the magnetic recording process 419 References 420 Further reading Magnetic evaluation of materials Methods for evaluation of intrinsic properties Methods for detection of flaws and other inhomogeneities Magnetic imaging methods Conclusions 453 References 455 Further reading 457 Solutions 459 Appendix 1: The magnetic field as a relativistic correction to the electric field 511 Appendix 2: Derivation of Maxwell's equation from the relativistic Lorentz transformation 515 Author index 521 Subject index 529
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