journal article·2018-05-01Open access

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

AIP Advances· Volume 8· Issue 5

Abstract

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.
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Research context

OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Shape Memory Alloy Transformations · Advanced Condensed Matter Physics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, University of Science and Technology Beijing 1 , Beijing 100083, P. R. China

National Institute of Metrology 2 , Beijing 100029, P. R. China

Department of Physics, Capital Normal University 3 , Beijing 100048, P. R. China

Beijing Institute of Aerospace Testing Technology, China Aerospace Science and Technology Corporation 4 , Beijing 100074, P. R. China

State key laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences & University of Chinese Academy of Sciences 5 , Beijing 100190, P. R. China

Funding

The China Postdoctoral Science Foundation Funded project · The Fundamental Research Funds for the Central Universities · The National Key Research and Development Program of China · The National Natural Science Foundation of China

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