期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 43, 期 15, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/43/15/152002
关键词
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资金
- FCT [CERN/FP/83643/2008, SFRH/BPD/39262/2007, SFRH/BD/17961/2004, SFRH/BPD/63942/2009]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/63942/2009, CERN/FP/83643/2008, SFRH/BPD/39262/2007, SFRH/BD/17961/2004] Funding Source: FCT
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.
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