Modeling specific heat and entropy change in La(Fe-Mn-Si)13-H compounds
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- 作者：Marco Piazzia ; Cecilia Bennatia ; b ; Carmen Curcioa ; b ; Michaela Kuepferlinga ; Vittorio Bassoa ; v.basso@inrim.it" class="auth_mail" title="E-mail the corresponding author
- 关键词：Magnetocaloric effect ; Entropy change ; Mean field theory ; Magnetoelastic coupling
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2016
- 出版时间：15 February 2016
- 年：2016
- 卷：400
- 期：Complete
- 页码：349-355
- 全文大小：946 K
文摘
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We use a magnetoelastic model to obtain entropy and specific heat in La(Fe,Mn,Si)13–H.
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Measured entropy changes are well reproduced by finely tuning the model parameters.
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Structural entropy at the transition counteracts the effect of magnetic entropy.
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Exchange coupling parameter is shown to depend on Mn content.
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Magnetoelastic coupling depends on the La(Fe,Si)13 structure.