Title :
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
Abstract :
The field dependence of the magnetocaloric effect (MCE) in Mn1.22Fe0.73P0.47Si0.53 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; Mn1.22Fe0.73P0.47Si0.53; 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);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2445975
