Ferromagnets with Random Anisotropy: Longitudinal Spin Resonance and Movable Anisotropy
- 25 April 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 50 (17) , 1320-1323
- https://doi.org/10.1103/physrevlett.50.1320
Abstract
Random anisotropy in ferromagnets causes small reorientations of the spins, so that they are not precisely collincar. As a consequence, an anisotropy torque develops for rotations about any axis. This requires the introduction of both a new macroscopic spin variable (to represent the macroscopic orientation about the magnetization) and an anisotropy triad. The macroscopic dynamics, including the dissipative motion of the anisotropy triad, is obtained, and a number of applications are considered. Most striking is the prediction of a longitudinal spin resonance mode.Keywords
This publication has 13 references indexed in Scilit:
- Spin Correlations in Nearly FerromagneticPhysical Review Letters, 1982
- Spin-resonance frequencies in spin-glasses with random anisotropiesPhysical Review B, 1982
- Anisotropy-Triad Dynamics in Spin-GlassesPhysical Review Letters, 1982
- Magnetic phases of amorphous transition metal-metalloid alloysJournal of Magnetism and Magnetic Materials, 1981
- Coexistence of Spin-Glass and Ferromagnetic OrderingsPhysical Review Letters, 1981
- Disappearance of Ferromagnetic Order in Au-FePhysical Review Letters, 1981
- Spin-Glass-Ferromagnetic Critical Line in Amorphous Fe-Mn AlloysPhysical Review Letters, 1980
- Towards a uniform magnetic phase diagram for magnetic alloys with mixed types of orderJournal of Applied Physics, 1979
- Solvable Model of a Spin-GlassPhysical Review Letters, 1975
- Random-Field Instability of the Ordered State of Continuous SymmetryPhysical Review Letters, 1975