Giant magnetocaloric effect of MnAs[sub 1-x]Sb[sub x]

Wada, H.; Tanabe, Y.
November 2001
Applied Physics Letters;11/12/2001, Vol. 79 Issue 20, p3302
Academic Journal
A giant magnetocaloric effect was found in MnAs, which undergoes a first-order ferromagnetic to paramagnetic transition at 318 K. The magnetic entropy change caused by a magnetic field of 5 T is as large as 30 J/K kg at the maximum value, which exceeds that of conventional magnetic refrigerant materials by a factor of 2–4. The adiabatic temperature change reaches 13 K in a field change of 5 T. The substitution of 10% Sb for As reduces the thermal hysteresis and lowers the Curie temperature to 280 K, while the giant magnetocaloric properties are retained. © 2001 American Institute of Physics.


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