Anisotropic exchange for dilute rare-earth alloys
Abstract
The exchange coupling between the 4f magnetic electrons and the 5 d-like screening electrons is calculated for Dy, Er, and Yb dilute magnetic alloys. The coupling is shown to be anisotropic, with significant orbital contributions for Dy and Yb. The g-shift expression is derived for arbitrary crystal-field splitting of the 5 d virtual bound states. The linewidths are computed in the limit of no crystal-field splittings. Comparison with experiments on Dy and Er in Ag and Al hosts reveals good agreement.
- Publication:
-
Physical Review B
- Pub Date:
- November 1976
- DOI:
- 10.1103/PhysRevB.14.4087
- Bibcode:
- 1976PhRvB..14.4087H