Title:
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Spin-phonon avalanches in Mn-12 acetate
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Author:
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Barco, Enrique del, 1968-; Hernández Ferràs, Joan Manel; Sales i Pardo, Marta; Tejada Palacios, Javier; Chudnovsky, Eugene M., 1948-; Broto, J. M.; Rakoto, H.
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Other authors:
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Universitat de Barcelona |
Abstract:
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We report experimental studies and suggest a quantitative model of spin relaxation in Mn12 acetate in a pulsed magnetic field in the temperature range 1.95.0 K. When the field applied along the anisotropy axis is swept at 140 T/s through a nonmagnetized Mn12 acetate sample, the samples magnetization switches, within a few milliseconds, from zero to saturation at a well-defined field whose value depends on temperature but is quantized in units of 0.46 T. A quantitative explanation of the effect is given in terms of a spin-phonon avalanche combined with thermally assisted resonant spin tunneling. |
Subject(s):
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-Materials magnètics -Relaxació magnètica -Propietats magnètiques -Spin (Física nuclear) -Magnetic materials -Magnetic relaxation -Spin (Nuclear physics) -Magnetic properties |
Rights:
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(c) The American Physical Society, 1999
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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