Field Dependence of the Magnetocaloric Effect in MnFe(P,Si) Materials

Author

Guillou, F. ; Yibole, H. ; Kamantsev, A. ; Porcari, G. ; Cwik, J. ; Koledov, V. ; van Dijk, N.H. ; Brick, E.

Author_Institution

Fundamental Aspects of Mater. & Energy, Delft Univ. of Technol., Delft, Netherlands

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

4

Abstract

The field dependence of the magnetocaloric effect (MCE) in Mn_1.22Fe_0.73P_0.47Si_0.53 is studied in terms of the entropy change (ΔS) and the temperature change (ΔT) for applied magnetic fields up to 5 and 14 T, respectively. The magnetic fields required to saturate the MCE in this system are ~1.7 and 4-5 T for ΔS and ΔT, respectively. The MCE field dependence is compared with the two approaches of the literature: 1) latent heat model and 2) the power law evolution predicted from the universal analysis of the MCE. It turns out that both of these methods are unsuitable to describe the MCE field evolution in MnFe(P,Si) materials.

Keywords

entropy; iron alloys; latent heat; magnetocaloric effects; manganese alloys; phosphorus alloys; silicon alloys; MCE field dependence; Mn_1.22Fe_0.73P_0.47Si_0.53; entropy change; latent heat model; magnetocaloric effect; power law evolution; Entropy; Heating; Magnetic field measurement; Magnetic fields; Magnetic hysteresis; Saturation magnetization; Temperature measurement; Magnetic materials; Magnetic properties; Magnetocaloric effect; magnetic properties; magnetocaloric effect (MCE);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2445975

Filename

7244252