Spin waves theory in rare-earth films

A microscopic theory is presented for surface and bulk spin waves in films of rare-earth magnetic materials. The spin-wave spectrum has been calculated in the framework of the Heisenberg model including axial and hexagonal anisotropy. The spin-wave dispersion relations are obtained for several film...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2002-04, Vol.246 (1), p.16-21
Main Authors: Chianca, C.V, Costa Filho, R.N
Format: Article
Language:English
Subjects:
Bulk band
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Exchange and superexchange interactions
Exchange interactions
Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
Rare-earth films
Spin waves
Surface modes
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A microscopic theory is presented for surface and bulk spin waves in films of rare-earth magnetic materials. The spin-wave spectrum has been calculated in the framework of the Heisenberg model including axial and hexagonal anisotropy. The spin-wave dispersion relations are obtained for several film thicknesses and different values of the ratio J 2/ J 1. The dependence of the bulk band edges on the anisotropy and exchange parameters are also discussed. Numerical results are applied to Dysprosium below the temperature transition from the ferromagnetic phase to spiral spin arrangement.
ISSN:0304-8853
DOI:10.1016/S0304-8853(01)01374-9