Spin Fluctuations in Itinerant Electron Magnetism (Paperback) (ISBN-13: 9783642825019)

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.

Author: Toru Moriya
ISBN-10: 364282501X
ISBN-13: 9783642825019
Publisher: Springer
Language: English
Published: 11/10/2012
Pages: 242
Format: Paperback
Weight: 0.80lbs
Size: 9.21h x 6.14w x 0.54d