Griffith Magnetism

The author introduces the concept that superconductivity can establish a perfect formalism of electricity and magnetism.

Magnetism is one of the oldest and most fundamental problems of Solid State Physics although not being fully understood up to now. On the other hand it is one of the hottest topic of current research. Practically all branches of modern technological developments are based on ferromagnetism, especially what concerns information technology.

Magnetic properties are exhibited to a greater or lesser ex- tent by all substances. Among solids, we can distinguish a group of magnetic substances whose magnetic properties are particular- ly pronounced: ferromagnets, ferrimagnets, and antiferromag- nets. The present treatment deals with some of the problems aris- ing in the theory of the magnetic phenomena in such substances. We shall call the theory of phenomena in strongly magnetic sub- stances the theory of strong magnetism or, simply, the theory of magnetism, because the weakly magnetic substances (paramagnets and diamagnets) will not be considered. The emphasis is on the methods giving general solutions and on the features character- istic of magnetic problems. The microscopic approach is used throughout.

This textbook emphasizes connections between theory and application, making physics concepts interesting and accessible to students while maintaining the mathematical rigour inherent in the subject. Frequent, strong examples focus on how to approach a problem, how to work with the equations, and how to check and generalize the result.

This book includes contributions from a variety of experts that examine the typical properties, uses, novel developments, and calibration of sensing magnetic devices.

Recent developments in electronic structure theory have led to a new understanding of magnetic materials at the microscopic level. This enables a truly first-principles approach to investigations of technologically important magnetic materials. Among these advances have been practical schemes for handling non-collinear magnetic systems, including relativity, understanding of the origins and role of orbital magnetism within band structure formalisms, density functional approaches for magnons and low-lying spin excitations, understanding of the interplay of orbital, spin and lattice orderings in complex oxides, transport theories for layered systems, and the theory of magnetic interactions in doped semiconductors. The book covers these recent developments with review articles by some of the main originators of these advances.

Knowledge of and skill in physics are essential foundations for studies in science and engineering. This book offers students an introduction to the basic concepts and principles of physics. It covers various topics specifically related to waves, sound, electricity, magnetism, and optics. Each chapter begins with a summary of concepts, principles, definitions, and formulae to be discussed, as well as ending with problems and solutions that illustrate the specific topic. Steps are detailed to help build reasoning and understanding. There are 250 worked problems and 100 exercises in the book, as well as 280 figures to help the reader visualize the processes being addressed. Computer calculations and solutions are carried out using wxMaxima to give insight and help build computational skills. The book is aimed at first-year undergraduate students studying introductory physics, and would also be useful for physics teachers in their instruction, particularly the exercises at the end of each chapter.