Magnetocaloric effect in layered NdMn2Ge0.4Si1.6
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Date
2011-06-06
Journal Title
Journal ISSN
Volume Title
Publisher
American Institute of Physics
Abstract
A giant magnetocaloric effect has been observed in NdMn2Ge0.4Si1.6 associated with the first-order magnetic phase transition from antiferromagnetism to ferromagnetism around T-C=36 K. The magnetic entropy change -Delta S-M and adiabatic temperature change Delta T-ad have been determined from magnetization and specific heat measurements (B=0-5 T) with -Delta S-M calculated by the Maxwell relation and Clausius-Clapeyron method. The values -Delta S-M(max) = 12.3 J kg(-1) K-1 and refrigerant capacity similar to 95 J/kg for Delta B=0-2 T as derived from the Maxwell relation, together with the small hysteresis (thermal < 0.5 K; magnetic field < 0.1 T), indicate the potential of NdMn2Ge0.4Si1.6 for refrigeration applications. (c) 2011 American Institute of Physics.
Description
Keywords
Antiferromagnetism, Ferromagnetism, Entropy, Hysteresis, Refrigerants, Antiferromagnetism
Citation
Wang, J.L., Campbell, S.J., Cadogan, J.M., Studer, A.J., Zeng, R., & Dou, S.X. (2011). Magnetocaloric effect in layered NdMn2Ge0.4Si1.6. Applied Physics Letters, 98(23), 232509. doi:10.1063/1.3599456