Journal article
Theory of Spin Waves in Strongly Anisotropic Magnets
A new infinite-order perturbation approach to the theory of spin waves in strongly anisotropic magnets is introduced. The system is transformed into one with effective two-ion anisotropy and considerably reduced ground-state corrections. A general expression for the spin-wave energy, valid to any order, is given in terms of a renormalized exchange interaction and two anisotropy parameters.
The relation between them and the fundamental parameters is given explicitly to second order.
Language: | English |
---|---|
Year: | 1976 |
Pages: | 5056-5059 |
ISSN: | 1550235x , 10980121 , 24699950 and 05562805 |
Types: | Journal article |
DOI: | 10.1103/PhysRevB.14.5056 |