Large magnetocaloric effect of NdGa compound due to successive magnetic transitions

X. Q. Zheng; J. W. Xu; S. H. Shao; H. Zhang; J. Y. Zhang; S. G. Wang; Z. Y. Xu; L. C. Wang; J. Chen; B. G. Shen

doi:10.1063/1.5006506

AIP Advances (May 2018)

Large magnetocaloric effect of NdGa compound due to successive magnetic transitions

X. Q. Zheng,
J. W. Xu,
S. H. Shao,
H. Zhang,
J. Y. Zhang,
S. G. Wang,
Z. Y. Xu,
L. C. Wang,
J. Chen,
B. G. Shen

Affiliations

X. Q. Zheng: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
J. W. Xu: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
S. H. Shao: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
H. Zhang: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
J. Y. Zhang: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
S. G. Wang: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
Z. Y. Xu: National Institute of Metrology, Beijing 100029, P. R. China
L. C. Wang: Department of Physics, Capital Normal University, Beijing 100048, P. R. China
J. Chen: Beijing Institute of Aerospace Testing Technology, China Aerospace Science and Technology Corporation, Beijing 100074, P. R. China
B. G. Shen: State key laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing 100190, P. R. China

DOI: https://doi.org/10.1063/1.5006506
Journal volume & issue: Vol. 8, no. 5
pp. 056425 – 056425-5

Abstract

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The magnetic behavior and MCE property of NdGa compound were studied in detail. According to the temperature dependence of magnetization (M-T) curve at 0.01 T, two sharp changes were observed at 20 K (TSR) and 42 K (TC), respectively, corresponding to spin reorientation and FM-PM transition. Isothermal magnetization curves up to 5 T at different temperatures were measured and magnetic entropy change (ΔSM) was calculated based on M-H data. Temperature dependences of –ΔSM for a field change of 0-2 T and 0-5 T show that there are two peaks on the curves corresponding to TSR and TC, respectively. The value of the two peaks is 6.4 J/kg K and 15.5 J/kg K for the field change of 0-5 T. Since the two peaks are close, the value of –ΔSM in the temperature range between TSR and TC keeps a large value. The excellent MCE performance of NdGa compound benefits from the existence of two successive magnetic transitions.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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