Magnetocaloric effect in the metamagnet ErRhSi compound

Debnath, J. C., Nair, Harikrishnan S., Strydom, Andre M., Ramesh Kumar, K. and Wang, Jianli 2016, Magnetocaloric effect in the metamagnet ErRhSi compound, Journal of applied physics, vol. 120, no. 23, pp. 233902-1-233902-6, doi: 10.1063/1.4971959.

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Title Magnetocaloric effect in the metamagnet ErRhSi compound
Author(s) Debnath, J. C.
Nair, Harikrishnan S.
Strydom, Andre M.
Ramesh Kumar, K.
Wang, Jianli
Journal name Journal of applied physics
Volume number 120
Issue number 23
Start page 233902-1
End page 233902-6
Total pages 6
Publisher AIP
Place of publication Melville, N.Y.
Publication date 2016-12-21
ISSN 0021-8979
Keyword(s) magnetic fields
heat capacity
Science & Technology
Physical Sciences
Physics, Applied
Summary 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.
Language eng
DOI 10.1063/1.4971959
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2016, AIP
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