On estimating the magnetocaloric effect from magnetization measurements
authors Amaral, JS; Amaral, VS
nationality International
journal JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
author keywords Magnetocaloric effect; Magnetic entropy; Phase transition
keywords TRANSFORMATION; MANGANITES
abstract We address various aspects one stimating the magnetocaloric effect from magnetization measurements, and the use of a Maxwell relation in first-and second-order phase transitions, including( a) the use of magnetization as a thermodynamic variable in an inhomogeneous situation (structural or chemical distributions, magnetic domains) and (b) non-equilibrium conditions (irreversibility) on first-order phase transitions, including mixed-phase conditions. We find that the Maxwell equation or any other methods such as area differentiation should be used with caution and not included at a out of equilibrium, which can lead to spurious results. The use of methods for modeling the magnetic entropy change of first- and second-order magnetic phase transitions, such as Landau and mean-field theory, can be helpful to better understand the nature of the commonly found anomalous peaks in magnetic entropy change and their physical relevance. (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 1552
ending page 1557
digital object identifier (doi) 10.1016/j.jmmm.2009.06.013
web of science category Materials Science, Multidisciplinary; Physics, Condensed Matter
subject category Materials Science; Physics
unique article identifier WOS:000275746100136
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journal analysis (jcr 2019):
journal impact factor 2.717
5 year journal impact factor 2.723
category normalized journal impact factor percentile 54.977
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