Itinerant-Electron Theory of Spin-Waves in hcp Cobalt
Abstract
A key component in the itinerant-electron theory of spin dynamics in ferromagnetic transition metals is the model used for the exchange matrix elements. This work describes how, within a tight-binding formalism, the complete set of matrix elements can be expressed in terms of a minimal number of parameters by invoking all the constraints imposed by the symmetry of the system. This theory is used to predict the spin-wave spectra of hcp cobalt. It is found that once the theory is symmetrically correct, with the correct magnetic moment, the dynamical behavior is rather insensitive to model details throughout most of the wave-vector range. *Research sponsored in part by the Division of Materials Sciences, U.S. Department of Energy under contract DE-AC05-84OR21400 with Lockheed Martin Energy Systems.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 1996
- Bibcode:
- 1996APS..MAR..R906C