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Non-Arrhenius temperature dependence of magnetic after effect.

Authors :
Swartzendruber, Lydon J.
Rugkwamsook, Pattana
Bennett, Lawrence H.
Della Torre, Edward
Source :
Journal of Applied Physics; 5/1/2000, Vol. 87 Issue 9, p5684, 3p, 4 Graphs
Publication Year :
2000

Abstract

The rate of magnetization change (magnetic after effect) which occurs after the magnetic field applied to a magnetic material is switched suddenly to a new value, is generally assumed to increase when the temperature is increased. Deviation from this temperature behavior, which has been observed in several cases, has been ascribed to changes in pertinent magnetic properties, such as magnetocrystalline anisotropy, activation volume, coercive field, etc., with temperature. We report here on the magnetic after effect temperature dependence of a magnetic recording material with magnetic properties that change very little with temperature over a wide temperature range but which, nevertheless, deviates considerably from a monotonic increase in decay rate with increasing temperature. We postulate that this behavior is explained by replacing the Maxwell–Boltzmann statistics by the Bose–Einstein statistics appropriate for the magnon energy distribution. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00218979
Volume :
87
Issue :
9
Database :
Complementary Index
Journal :
Journal of Applied Physics
Publication Type :
Academic Journal
Accession number :
5401232
Full Text :
https://doi.org/10.1063/1.372489