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Covering basic physical concepts, experimental methods, and applications, this book is an indispensable text on the fascinating science of magnetism, and an invaluable source of practical reference data. Accessible, authoritative, and assuming undergraduate familiarity with vectors, electromagnetism and quantum mechanics, this textbook is well suited to graduate courses. Emphasis is placed on practical calculations and numer- ical magnitudes – from nanoscale to astronomical scale – focussing on mod- ern applications, including permanent magnet structures and spin electronic devices. Each self-contained chapter begins with a summary, and ends with exercises and further reading. The book is thoroughly illustrated with over 600 figures to help convey concepts and clearly explain ideas. Easily digestible tables and data sheets provide a wealth of useful information on magnetic properties. The 38 principal magnetic materials, and many more related compounds, are treated in detail.

1 Introduction 1.1 A brief history of magnetism 1.2 Magnetism and hysteresis 1.3 Magnet applications 1.4 Magnetism, the felicitous science 2 Magnetostatics 2.1 The magnetic dipole moment 2.2 Magnetic fields 2.3 Maxwell’s equations 2.4 Magnetic field calculations 2.5 Magnetostatic energy and forces 3 Magnetism of electrons 3.1 Orbital and spin moments 3.2 Magnetic field effects 3.3 Theory of electronic magnetism 3.4 Magnetism of electrons in solids 4 Magnetism of localized electrons on the atom 4.1 The hydrogenic atom and angular momentum 4.2 The many-electron atom 4.3 Paramagnetism 4.4 Ions in solids; crystal-field interactions 5 Ferromagnetism and exchange 5.1 Mean field theory 5.2 Exchange interactions 5.3 Band magnetism 5.4 Collective excitations 5.5 Anisotropy 5.6 Ferromagnetic phenomena 6 Antiferromagnetism and other magnetic order 6.1 Molecular field theory of antiferromagnetism 6.2 Ferrimagnets 6.3 Frustration 6.4 Amorphous magnets 6.5 Spin glasses 6.6 Magnetic models 7 Micromagnetism, domains and hysteresis 7.1 Micromagnetic energy 7.2 Domain theory 7.3 Reversal, pinning and nucleation 8 Nanoscale magnetism 8.1 Characteristic length scales 8.2 Thin films 8.3 Thin-film heterostructures 8.4 Wires and needles 8.5 Small particles 8.6 Bulk nanostructures 9 Magnetic resonance 9.1 Electron paramagnetic resonance 9.2 Ferromagnetic resonance 9.3 Nuclear magnetic resonance 9.4 Other methods 10 Experimental methods 10.1 Materials growth 10.2 Magnetic fields 10.3 Atomic-scale magnetism 10.4 Domain-scale measurements 10.5 Bulk magnetization measurements 10.6 Excitations 10.7 Numerical methods 11 Magnetic materials 11.1 Introduction 11.2 Iron group metals and alloys 11.3 Rare-earth metals and intermetallic compounds 11.4 Interstitial compounds 11.5 Oxides with ferromagnetic interactions 11.6 Oxides with antiferromagnetic interactions 11.7 Miscellaneous materials 12 Applications of soft magnets 12.1 Losses 12.2 Soft magnetic materials 12.3 Static applications 12.4 Low-frequency applications 12.5 High-frequency applications 13 Applications of hard magnets 13.1 Magnetic circuits 13.2 Permanent magnet materials 13.3 Static applications 13.4 Dynamic applications with mechanical recoil 13.5 Dynamic applications with active recoil 13.6 Magnetic microsystems 14 Spin electronics and magnetic recording 14.1 Spin-polarized currents 14.2 Materials for spin electronics 14.3 Magnetic sensors 14.4 Magnetic memory 14.5 Other topics 14.6 Magnetic recording 15 Special topics 15.1 Magnetic liquids 15.2 Magnetoelectrochemistry 15.3 Magnetic levitation 15.4 Magnetism in biology and medicine 15.5 Planetary and cosmic magnetism Appendices Appendix A Notation Appendix B Units and dimensions Appendix C Vector and trigonometric relations Appendix D Demagnetizing factors for ellipsoids of revolution

J. M. D. Coey leads the Magnetism and Spin Electronics group at Trinity College, Dublin, where he is Erasmus Smith’s Professor of Natural and Exper- imental Philosophy. An authority on magnetism and its applications, he has been awarded the Gold Medal of the Royal Irish Academy and the Charles Chree Medal of the Institute of Physics for his work on magnetic materials

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