Phys. Rev. B 50, 3077–3084 (1994)Effects of surface anisotropy on hysteresis in fine magnetic particlesReceived 30 March 1994; published in the issue dated 1 August 1994 We solve numerically the dissipative Landau-Lifshitz-Gilbert equations to consider hysteresis in fine magnetic particles. Finite-size effects are studied for two models with uniaxial anisotropy—bulk random axis and surface anisotropy only. It is demonstrated that the latter model introduces considerable effects for small enough particles when the coupling to the anisotropy is equal or greater than the coupling to the isotropic Heisenberg exchange. We show that some features of magnetization reversal are associated with spins at the surface of fine particles. © 1994 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.50.3077
DOI:
10.1103/PhysRevB.50.3077
PACS:
75.10.Hk, 75.60.Jp, 75.10.Nr, 75.30.Gw
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.