Handling mixed-state magnetization data for magnetocaloric studies-a solution to achieve realistic entropy behaviour
authors Das, S; Amaral, JS; Amaral, VS
nationality International
journal JOURNAL OF PHYSICS D-APPLIED PHYSICS
keywords TRANSITION; GD-5(SI2GE2); VICINITY
abstract We present an approach to extract a realistic magnetic entropy value from non-equilibrium magnetization data near the transition temperature of a typical first-order system with a mixed-phase state, influenced by the phase transformation, which is responsible for large values reported, even higher than the theoretical limit. The effect of the mixed-phase state is modelled in the magnetization and its non-physical contribution is removed to obtain the magnetic entropy in accordance with calorimetric experiment and theoretical simulation. This approach gives a reliable estimation of the magnetic entropy value incorporating experimental non-equilibrium magnetization data and correcting the use of Maxwell's relation.
publisher IOP PUBLISHING LTD
issn 0022-3727
year published 2010
volume 43
issue 15
digital object identifier (doi) 10.1088/0022-3727/43/15/152002
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000276108100002
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journal impact factor 2.373
5 year journal impact factor 2.707
category normalized journal impact factor percentile 63.356
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