Determination of adiabatic temperature change in MnFe(P,Ge) compounds with pulse-field method

Journal article (2009)
Department
Radiation Radionuclides & Reactors (AS) (TU Delft)
Copyright: ©2010 Trung, N.T., Klaasse, J.C.P., Tegus, O., Cam Thanh, D.T., Buschow, K.H.J., Brück, Institute of Physics
DOI: https://doi.org/doi:10.1088/0022-3727/43/1/015002
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Published Date

07-12-2009

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Source:

Journal of physics D. Applied physics, 43 (1) 2010

ISSN:

0022-3727

ISBN:

0022-3727

Source:

http://iopscience.iop.org/0022-3727/43/1/015002

Faculty

Applied Sciences

Department

Radiation Radionuclides & Reactors

Abstract

Fast magnetic measurements performed by means of a 20 T pulse-field magnet provide a good approach for directly monitoring the magnetocaloric effect of the MnFe(P,Ge) compounds. Based on the comparison of magnetization curves obtained either in an adiabatic or isothermal process, we propose that the method introduced by Levitin et al is applicable to determine the adiabatic temperature change for an equivalent field change in first-order magnetic transition materials. More strikingly, experimental results confirm that the first-order nature of the transition in MnFe(P,Ge) alloys is not a limiting factor to the operation frequency of a magnetic refrigerator.

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