Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9834315 | Journal of Magnetism and Magnetic Materials | 2005 | 7 Pages |
Abstract
A first-principle theory of spontaneous volume magnetostriction is presented. It is based on self-consistent electronic structure calculations for a magnetically ordered ground state and a disordered local moment state. The effect of highly localized 4f orbitals of rare-earth (R) atoms is taken into account by an open-core treatment within the local spin-density approximation. The theory is applied to hexagonal gadolinium and to selected intermetallic compounds with the cubic C15 Laves structure: RCo2 (R=Gd, Dy, Er) and GdAl2. The results are compared to those of experiment and discussed in terms of: (i) magnitudes of the local moments and (ii) volume-dependent exchange interactions.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
I. Turek, J. Rusz, M. Diviš,