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Abbreviated Journal Title

Phys. Rev. E

Keywords

Glass-Transition; Spin-Glass; Magnetic Viscosity; Time-Dependence; Particles; Susceptibility; Relaxation; Films; Decay; Physics; Fluids & Plasmas; Physics; Mathematical

Abstract

Time decays of low-dimensional magnetic dipoles with anisotropic energy barriers were studied theoretically. We found that the dynamic behaviors are interaction specific. For a chain with ferromagnetic coupling, a single mode dominates and the decay is essentially exponential. For antiferromagnetic coupling, the dynamics can be characterized by two distinct groups of time scales. The spectrum results in a plateau in the decay of remanent magnetization. This novel behavior differs from the prediction of the mean-field theory. For a two-dimensional rectangular lattice, a transition between the bimodal decay and a quasilogarithmic decay occurs when the ratio of length to width varies.

Journal Title

Physical Review E

Volume

56

Issue/Number

4

Publication Date

1-1-1997

Document Type

Article

Language

English

First Page

3986

Last Page

3992

WOS Identifier

WOS:A1997YC32200037

ISSN

1063-651X

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