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

Journal article (2016)

Authors

P. Roy Radboud Universiteit Nijmegen
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
RA de Groot Radboud Universiteit Nijmegen
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Copyright: © 2016 P. Roy, E.H. Brück, R.A. de Groot
DOI
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https://doi.org/10.1103/PhysRevB.93.165101
More Info
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Published Date

2016

Language

English

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Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

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.