Estimating spontaneous magnetization from a mean field analysis of the magnetic entropy change
authors Amaral, JS; Silva, NJO; Amaral, VS
nationality International
journal JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
author keywords Magnetocaloric effect; Magnetic entropy; Phase transitions
abstract The magnetocaloric effect is a common property of all magnetic systems, corresponding to a temperature change under a diabatic conditions (Delta T-ad) or a change in magnetic entropy in isothermal conditions (Delta S-M), for a given applied magnetic field change. Delta T-ad can be directly measured under adiabatic conditions and in directly estimated from specific heat measurements. DSM can be indirectly estimated from specific heat measurements or magnetization measurements (the usual approach). Early work on the study of ferromagnets used direct measurements of Delta T-ad to determine the spontaneous magnetization for a given temperature value. In this work, we use DSM obtained from isothermal magnetization measurements to estimate the spontaneous magnetization, comparing this result to mean-field fittings from a novel scaling method, discussing the validity and usefulness of this approach from considerations from the Landau theory of phase transitions. (C) 2009 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0304-8853
year published 2010
volume 322
issue 9-12
beginning page 1569
ending page 1571
digital object identifier (doi) 10.1016/j.jmmm.2009.09.024
web of science category Materials Science, Multidisciplinary; Physics, Condensed Matter
subject category Materials Science; Physics
unique article identifier WOS:000275746100140
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  impact metrics
times cited (wos core): 18
journal impact factor (jcr 2016): 2.630
5 year journal impact factor (jcr 2016): 2.360
category normalized journal impact factor percentile (jcr 2016): 67.281
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