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Partially-disordered to frozen-state crossover induced magnetocaloric properties of the antiferromagnetic one-dimensional spin-chain Sr(3)ColrO(6)

Murthy, Krishna K and Nileena, N and Vishnugopal, VS and Kumar, Anil PS (2019) Partially-disordered to frozen-state crossover induced magnetocaloric properties of the antiferromagnetic one-dimensional spin-chain Sr(3)ColrO(6). In: MATERIALS RESEARCH EXPRESS, 6 (5).

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Official URL: https://doi.org/10.1088/2053-1591/ab03a4

Abstract

Low-dimensional and geometrically frustrated spin-chain Sr-3(Co/Ni)IrO6 compounds exhibit interesting physical phenomena due to the exotic anisotropy associated with the spin-orbit entangled Ir4+ state. Temperature dependent magnetic susceptibility of polycrystalline Sr3CoIrO6 characterizes the partially-disordered antiferromagnetic with T-N1 similar to 90 K and the frozen state of this antiferromagnetic order below T-N2 similar to 30 K. The fitting of chi T versus T (K) data to the Ising model reveal that the intra-chain exchange interactions are ferromagnetic, whereas the inter-chain exchange correlations are antiferromagnetic. Field-induced alteration of the partially-disordered antiferromagnetic state in the temperature regime of T-N1 <= T <= T-N2 is responsible for the anomalous magnetic hysteresis loop. Further, a large value of isothermal magnetic-entropy change (Delta S-M similar to 22 J kg(-1)K(-1) for 7 T), absence of thermal hysteresis in magnetization and highly insulating nature consents Sr3CoIrO6 to be classified as a good magnetocaloric material for the low-temperature refrigeration.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to IOP PUBLISHING LTD
Keywords: metamagnetism; disordered antiferromagnetism; magnetocaloric effect
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 01 Mar 2019 05:28
Last Modified: 01 Mar 2019 05:28
URI: http://eprints.iisc.ac.in/id/eprint/61864

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