Magnetocaloric effect in Ho2In over a wide temperature range

Zhang, Q.; Cho, J. H.; Li, B.; Hu, W. J.; Zhang, Z. D.
May 2009
Applied Physics Letters;5/4/2009, Vol. 94 Issue 18, p182501
Academic Journal
The compound Ho2In exhibits two successive magnetic phase transitions: a spin-reorientation transition at TSR=32 K and a magnetic-ordering transition at TC=85 K. The maximum reversible -ΔSM values are 6.3 and 11.2 J/kg K at TSR and TC, respectively, for a field change of 5 T. These two -ΔSM peaks with the same sign are partly overlapping, which results in a wide temperature interval with appreciable magnetocaloric effect. The results on Ho2In indicate that materials with successive SR and magnetic-ordering transitions may constitute an important new class of magnetic refrigerants since they work in a wider temperature range than the conventional refrigerant materials.


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