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Experimental isothermal section phase diagram of Ho–Fe–In at 773 K and magnetic properties of Ho12Fe2.08In2.92 alloy

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Abstract

The isothermal section of the Ho–Fe–In system at 773 K has been constructed by X-ray powder diffraction. One known structure ternary compound Er12Fe2In3-type Ho12Fe2In3 has been confirmed. At the same time, solid solutions are not detected in Ho–Fe–In system at 773 K. The magnetic transition and magnetocaloric effect of Ho12Fe2.08In2.92 alloy with Er12Fe2In3-type structure were investigated by magnetic susceptibility and isothermal magnetization measurements. One normal antiferromagnetic–paramagnetic transition and another abnormal one are discovered at 18 and 76 K in ground state, respectively. Owing to a first-order field-induced metamagnetic transition (antiferromagnetic–ferromagnetic) at/below the Néel temperature of 18 K), the negative entropy changes are observed at corresponding temperature. There is only a second-order ferromagnetic–paramagnetic transition near Curie temperature (TC), the maximum entropy change (\( \Delta S_{ {\rm max} } \)) values are − 6.14 J·kg−1·K−1 at 3 K and 7.88 J·kg−1·K−1 at 28 K in a field range of 0–7 T. The reversible relative cooling power corresponding to negative entropy change can reach about 600 J·kg−1 in an wide operating temperature region \( \Delta T_{\text{cycl}} \) = 74 K from 16 to 90 K, which suggests that Ho12Fe2.08In2.92 could be a potential material for magnetic refrigeration in the corresponding temperature range.

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Acknowledgements

This work was financially supported by the Department of Science and Technology of Sichuan Province in China (No. 2017JY0181).

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Authors and Affiliations

  1. The College of Physics and Electronic Information Engineering, Neijiang Normal University, Neijiang, 641002, China

    Xiang Chen & Chao Ni

  2. The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, IA, 50011-3020, USA

    Xiang Chen

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  1. Xiang Chen
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  2. Chao Ni
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Correspondence to Xiang Chen.

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Chen, X., Ni, C. Experimental isothermal section phase diagram of Ho–Fe–In at 773 K and magnetic properties of Ho12Fe2.08In2.92 alloy. Rare Met. 40, 987–994 (2021). https://doi.org/10.1007/s12598-020-01532-z

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  • DOI: https://doi.org/10.1007/s12598-020-01532-z

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