Magnetocaloric effect and critical exponents of Fe 77 Co 5.5 Ni 5.5 Zr 7 B 4 Cu 1 : A detailed study

The critical exponents of the alloy have been determined with the Kouvel-Fisher method to predict the field dependence of the magnetic entropy change Δ S M . The nonlinear fit of Δ S M ( H ) to a power law provides a field exponent in perfect agreement with the predictions of the relevant scaling la...

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Published in:Journal of applied physics 2011-03, Vol.109 (7), p.07A905-07A905-3
Main Authors: Franco, V., Caballero-Flores, R., Conde, A., Knipling, K. E., Willard, M. A.
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Summary:The critical exponents of the alloy have been determined with the Kouvel-Fisher method to predict the field dependence of the magnetic entropy change Δ S M . The nonlinear fit of Δ S M ( H ) to a power law provides a field exponent in perfect agreement with the predictions of the relevant scaling laws using the obtained critical exponent values. It is shown that possible discrepancies between these two methods for determining the field dependence of Δ S M might arise due to a poor resolution in the temperature of the experiments.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3535191