Inverse and enhanced magnetocaloric properties of HoCrO3

Kotnana, G and Sahu, D P and Jammalamadaka, S N (2017) Inverse and enhanced magnetocaloric properties of HoCrO3. Journal of Alloys and Compounds. ISSN 0925-8388 (In Press)

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Abstract

We report on the magnetic and magnetocaloric properties of 50% Fe3+ doped polycrystalline HoCrO3 compounds in the vicinity of magnetic transitions. Due to complex magnetic interactions, we do see multiple transitions in χ vs. T graph pertinent to HoCrO3 and HoCr0.5Fe0.5O3 compounds related with Ho3+ ordering, Cr3+ ordering and spin – reorientation (SR). Due to re-orientation of spins, metamagnetic transitions are evident in low field regime of M vs. H. Quantified values of -ΔSM around Ho3+ ordering infer that indeed Fe3+ substitution helped in enhancing magnetocaloric effect of HoCrO3 compound. Such an enhanced -ΔSM values are ascribed to increase in canting of Fe/Cr spins. Present results would be helpful in developing magnetic refrigerant materials for space applications particularly below 30 K.

Item Type: Article
Uncontrolled Keywords: Magnetocaloric effect; Magnetization crossover; Metamagnetic transition; Spin – re-orientation
Subjects: Physics > Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 20 Mar 2017 04:19
Last Modified: 20 Mar 2017 04:19
URI: http://raiith.iith.ac.in/id/eprint/3096
Publisher URL: http://dx.doi.org/10.1016/j.jallcom.2017.03.132
OA policy: http://www.sherpa.ac.uk/romeo/issn/0925-8388/
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