Dynamics of two interacting dipoles

Laroze, D; Vargas, P.; Cortes C.; Gutierrez G.

Abstract

We study the deterministic spin dynamic of two interacting magnetic moments with anisotropy and dipolar interaction under the presence of an applied magnetic field, by using the Landau-Lifshitz equation with and without a damping term. Due to different kinds of interactions, different time scales appear: a long time scale associated with the dipolar interaction and a short time scale associated with the Zeeman interaction. We found that the total magnetization is not conserved; furthermore, for the non-dissipative case it is a fluctuating function of time, with a strong dependence on the strength of the dipolar term. In the dissipative case there is a transient time before the total magnetization reaches its constant value. We examine this critical time as a function of the distance between the magnetic moments and the phenomenological damping coefficient, and found that it strongly depends on these control parameters. © 2007 Elsevier B.V. All rights reserved.

Más información

Título según WOS: Dynamics of two interacting dipoles
Título según SCOPUS: Dynamics of two interacting dipoles
Título de la Revista: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volumen: 320
Número: 8
Editorial: Elsevier
Fecha de publicación: 2008
Página de inicio: 1440
Página final: 1448
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0304885307009882
DOI:

10.1016/j.jmmm.2007.12.010

Notas: ISI, SCOPUS