Magnetocaloric effect in layered NdMn2Ge0.4Si1.6

Authors

Jianli Wang, University of WollongongFollow
S.J Campbell, University of New South Wales
J.M Cadogan, University of Manitoba Canada
A J Studer, ANSTO
Rong Zeng, University of WollongongFollow
S. X. Dou, University of WollongongFollow

RIS ID

54251

Publication Details

Wang, J. L., Campbell, S. J., Cadogan, J. M., Studer, A. J., Zeng, R. and Dou, S. X. Magnetocaloric effect in layered NdMn₂Ge_0.4Si_1.6 (2011). Applied Physics Letters, 98 (23), 232509-1-232509-3.

Abstract

A giant magnetocaloric effect has been observed in NdMn₂Ge_0.4Si_1.6 associated with the first-order magnetic phase transition from antiferromagnetism to ferromagnetism around T_C = 36 K. The magnetic entropy change –ΔS_M and adiabatic temperature change ΔT_ad have been determined from magnetization and specific heat measurements (B = 0–5 T) with –ΔS_M calculated by the Maxwell relation and Clausius–Clapeyron method. The values –ΔSMmax = 12.3 J kg⁻¹ K⁻¹ and refrigerant capacity ∼ 95 J/kg for ΔB = 0–2 T as derived from the Maxwell relation, together with the small hysteresis (thermal 2Ge_0.4Si_1.6 for refrigeration applications.

Grant Number

ARC/DP0879070

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0879070