Low temperature giant magnetocaloric effect in multiferroic GdMnO3 single crystals

Wagh, Aditya A and Suresh, KG and Kumar, Anil PS and Elizabeth, Suja (2015) Low temperature giant magnetocaloric effect in multiferroic GdMnO3 single crystals. In: JOURNAL OF PHYSICS D-APPLIED PHYSICS, 48 (13). (In Press)

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Abstract

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.

Item Type:	Journal Article
Publication:	JOURNAL OF PHYSICS D-APPLIED PHYSICS
Publisher:	IOP PUBLISHING LTD
Additional Information:	Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Keywords:	magnetocaloric effect; single crystals; multiferroics
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	23 Apr 2015 07:38
Last Modified:	23 Apr 2015 07:38
URI:	http://eprints.iisc.ac.in/id/eprint/51353

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