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Magnetocaloric effect of Gd5Si2Ge2 alloys in low magnetic field

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Abstract

The magnetocaloric effect of Gd5Si2Ge2 alloys under heat treatment conditions are investigated in low magnetic fields. The magnetocaloric effect (MCE) is studied by measuring magnetic entropy change (ΔS M) and adiabatic temperature change (ΔT ad) in a magnetic field of 1·5 T using a vibrating sample magnetometer (VSM) and a home-made magnetocaloric effect measuring apparatus, respectively. The maximum ΔS M of the alloys increases by 200% from 4·38 to 13·32 J kg−1 K−1, the maximum ·T ad increases by 105% from 1·9 to 3·9 K when compared to the as-cast due to the homogeneous composition distribution and microstructure, while the magnetic ordering temperature is slightly reduced. These results indicate that the annealed Gd5Si2Ge2 compounds are promising as high-performance magnetic refrigerants working room temperature in relatively low magnetic fields.

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Authors and Affiliations

  1. Advance Technology and Materials Co, Ltd, China Iron and Steel Research Institute Group, Beijing, 100081, P.R. China

    Hong Zeng & Chunjiang Kuang

  2. The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing, 100022, P.R. China

    Jiuxing Zhang & Ming Yue

Authors
  1. Hong Zeng
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  2. Chunjiang Kuang
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  3. Jiuxing Zhang
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  4. Ming Yue
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Correspondence to Hong Zeng.

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Zeng, H., Kuang, C., Zhang, J. et al. Magnetocaloric effect of Gd5Si2Ge2 alloys in low magnetic field. Bull Mater Sci 34, 825–828 (2011). https://doi.org/10.1007/s12034-011-0201-6

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  • DOI: https://doi.org/10.1007/s12034-011-0201-6

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