Latent heat of the first-order magnetic transition of MnFeSio.33P0.66

P. Roy, Ekkes Brück, R.A. de Groot

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The latent heat of a magnetoelastic phase transition is used as a measure of the magnetocaloric effect since it is directly proportional to the entropy change. Taking MnFeSi0.33P0.66 as a model magnetocaloric material, density functional theory calculations in addition to the phonon calculations based on the density functional perturbation theory were performed in order to calculate the latent heat of the magnetoelastic phase transition. The Curie temperature (TC) was determined by taking into account the quasiharmonic approximation and the configurational entropy. The material exhibits a first-order magnetic transition accompanied by a large latent-heat (19.97 kJ/kg) near-room-temperature operation.
Original languageEnglish
Article number165101
Number of pages6
JournalPhysical Review B (Condensed Matter and Materials Physics)
Volume93
Issue number16
DOIs
Publication statusPublished - 2016

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