Large inverse and normal magnetocaloric effects in HoBi compound with nonhysteretic first-order phase transition |
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| Affiliation: | 1.School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;2.Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;3.Laboratory of Magnetic and Electric Functional Materials and Applications, The Key Laboratory of Shanxi Province, Taiyuan 030024, China;4.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | HoBi single crystal and polycrystalline compounds with NaCl-type structure are successfully obtained, and their magnetic and magnetocaloric properties are studied in detail. With temperature increasing, HoBi compound undergoes two magnetic transitions at 3.7 K and 6 K, respectively. The transition temperature at 6 K is recognized as an antiferromagnetic-to-paramagnetic (AFM-PM) transition, which belongs to the first-order magnetic phase transition (FOMT). It is interesting that the HoBi compound with FOMT exhibits good thermal and magnetic reversibility. Furthermore, a large inverse and normal magnetocaloric effect (MCE) is found in HoBi single crystal in the $H|| 100]$ direction, and the positive $\Delta S_{\rm M}$ peak reaches 13.1 J/kg$\cdot$K under a low field change of 2 T and the negative $\Delta S_{\rm M}$ peak arrives at $-18 $ J/kg$\cdot$K under a field change of 5 T. These excellent properties are expected to be applied to some magnetic refrigerators with special designs and functions. |
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| Keywords: | magnetocaloric effect antiferromagnetic rare-earth compounds |
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