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Magnetocaloric effect in the metamagnet ErRhSi compound

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journal contribution
posted on 2016-12-21, 00:00 authored by Jyotish Debnath, H S Nair, A M Strydom, K Ramesh Kumar, J Wang
The magnetocaloric effect is observed in the 1:1:1 compound ErRhSi, which is a metamagnet is reported in this paper. ErRhSi crystallizes in the orthorhombic space group Pnma, adopting the TiNiSi structure type, with lattice parameters a(Å) = 6.7903(5), b(Å) = 4.1881(3), and c(Å) = 7.3847(4). Our magnetic measurements confirm an antiferromagnetic phase transition at TN ≈ 8.5 K, also supported by the specific heat measurement. Crystal field effects of Er3+ are suggested by the inverse magnetic susceptibility data which do not conform to an ideal Curie-Weiss behaviour and also by the total entropy that attains Rln (2) at TN. Although the magnetic hysteresis indicates ErRhSi to be a soft magnet, several clear metamagnetic features are observed at 2 K. Magnetic entropy change ΔSM = − 8.7 J/kg-K is observed at about 9 K with the application of 5 T magnetic field. The corresponding adiabatic temperature change ΔTad is about 4 K. Large magnetocaloric effects suggest that this material is suitable for the low temperature magnetic refrigeration.

History

Journal

Journal of applied physics

Volume

120

Issue

23

Pagination

233902-1 - 233902-6

Publisher

AIP

Location

Melville, N.Y.

ISSN

0021-8979

eISSN

1089-7550

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2016, AIP

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