Magnetocaloric effect in HoMnO3 crystal

Midya, A.; Mandal, P.; Das, S.; Banerjee, S.; Chandra, L. S. Sharath; Ganesan, V.; Barman, S. Roy
April 2010
Applied Physics Letters;4/5/2010, Vol. 96 Issue 14, p142514
Academic Journal
We have investigated the magnetic and magnetocaloric properties of HoMnO3 single crystal. HoMnO3 displays a series of complicated phase transitions due to the long range ordering of Mn3+ and Ho3+ moments. Field variation in magnetization generates a metamagnetic transition and produces an entropy change of 13.1 J/kg K at 7 T in the vicinity of antiferromagnetic ordering temperature of Ho3+. The values of adiabatic temperature change (∼6.5 K) and relative cooling power (∼320 J/kg) for a field change of 7 T are also appreciable to consider HoMnO3 as a magnetic refrigerant at low temperature.


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