期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 48, 期 13, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/48/13/135001
关键词
magnetocaloric effect; single crystals; multiferroics
资金
- DST, Government of India
Magnetocaloric (MC) properties of GdMnO3 single crystals are investigated using magnetic and magneto-thermal measurements. GdMnO3 exhibits a giant MC effect (isothermal change in magnetic entropy (-Delta S-M) similar to 31 J (kg K)(-1) at 7 K and adiabatic change in temperature similar to 10 K at 19 K for magnetic field variation 0-80 kOe). Complex interactions between 3d and 4f magnetic sublattices influence MC properties. The rare-earth antiferromagnetic ordering induces an inverse MC effect (positive Delta S-M) along 'a' and 'c' axes whereas it's not seen along the 'b' axis, revealing complex anisotropic magnetic ordering. The antiferromagnetic ordering possibly changes to ferromagnetic ordering at higher fields.
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