Controllable magnetic transitions and magnetocaloric effect of Ho1-xTmxNi (0≤x≤0.8) compounds

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

doi:10.1063/1.5128856

AIP Advances (Jan 2020)

Controllable magnetic transitions and magnetocaloric effect of Ho1-xTmxNi (0≤x≤0.8) compounds

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

Affiliations

J. W. Xu: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
X. Q. Zheng: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
S. H. Shao: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
S. X. Yang: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
J. Y. Zhang: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
S. G. Wang: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
J. Liu: State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing 100190, China
Y. L. Liu: State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing 100190, China
Y. Zhang: Taiyuan University of Science and Technology, Taiyuan 030024, China
Z. Y. Xu: National Institute of Metrology, Beijing 100029, China
L. C. Wang: Department of Physics, Capital Normal University, Beijing 100048, China
B. G. Shen: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

DOI: https://doi.org/10.1063/1.5128856
Journal volume & issue: Vol. 10, no. 1
pp. 015224 – 015224-5

Abstract

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Polycrystalline Ho1-xTmxNi (0≤x≤0.8) compounds were successfully prepared by an arc-melting method, and the crystal structure, magnetic properties and magnetocaloric effect (MCE) were investigated in detail. X-ray diffraction (XRD) results indicate that Ho1-xTmxNi (0≤x≤0.8) compounds are pure phases with FeB-type orthorhombic structure (space group Pnma). Magnetic measurements show that HoNi alloy undergoes a spin reorientation (SR) transition and a ferromagnetic (FM) to paramagnetic (PM) transition at 13.5 K and 35.5 K, respectively. Rare earth atoms Tm with small spin were used to substitute Ho atoms in HoNi compound in order to adjust the magnetic phase transitions and to further optimize the magnetocaloric effect (MCE). With increasing Tm content from 0 to 0.8, the refrigerant temperature span decreases from 41.6 K to 17.3 K. When the content of Tm is 0.3, a platform-shaped isothermal magnetic entropy change (-ΔSM) curve is obtained and the value of -ΔSM is relatively stable over 35 K. Our findings are of great importance for HoTmNi compounds in practical applications.

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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