Dynamic generalization of Stoner{endash}Wohlfarth model
A dynamic generalization of the Stoner{endash}Wohlfarth (SW) model is presented, in which the applied field component h{sub az} parallel to the particle anisotropy axis is slowly varied, whereas the one in the perpendicular plane, h{sub a{perpendicular}}, is rotated at the angular frequency {omega}. The Landau{endash}Lifshitz{endash}Gilbert equation is solved to calculate the system response under the constraint of spatially uniform magnetization at all times. Switching under slowly varying h{sub az} is discussed. Various switching modes can occur in correspondence of different types of bifurcation present in the dynamics. In addition, it is shown that the system response can become quasiperiodic, with spontaneous magnetization oscillations at a frequency definitely lower than {omega}. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204084
- Journal Information:
- Journal of Applied Physics, Vol. 89, Issue 11; Other Information: DOI: 10.1063/1.1355346; Othernumber: JAPIAU000089000011007451000001; 197111MMM; PBD: 1 Jun 2001; ISSN 0021-8979
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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