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After a brief discussion of the magnetic cross, some well known examples of magnetic excitations are presented, such as those in Ni and Gd. In the limit of small exchange interactions and localised electron states, the excitation spectra consist of crystal-field and spin-orbit levels. An example is given of such excitations in the new high T(c) materials containing rare-earths. Finally, the magnetic excitation spectra are discussed for the important case in which an interaction occurs between the valence and conduction electron states. Such interactions give rise to intermediate valence states, the Kondo, and heavy-fermion ground states and, possibly the superconductivity in high T(c) materials.

Additional information

Authors: LANDER G H, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: Swiss Summer School, Zuoz (CH), August 15-21, 1993
Availability: Available from (1) as Paper EN 37892 ORA
Record Number: 199311357 / Last updated on: 1994-11-28
Original language: en
Available languages: en
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