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The giant magnetocaloric effect in Gd5Si2Ge2 with low purity gadolinium

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Chinese Science Bulletin

Abstract

The giant magnetocaloric effect Gd5Si2Ge2 alloy was prepared with 99wt% low purity commercial Gd. Powder XRD and magnetic measurements showed that the Gd5Si2Ge2 alloy annealed at 1200°C for 1 h had a significant magneticcrystallographic first order phase transition at about 270 K. The maximal magnetic entropy change is 17.55 J · kg−1 · K−1 under a magnetic field change of 0–5 T. The distinct increase of magnetic entropy change belongs to the first-order phase transition from the orthorhombic Gd5Si4-type to the monoclinic Gd5Si2Ge2-type after high temperature heat-treatment.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Sichuan University, 610065, Chengdu, China

    Tiebang Zhang, Yungui Chen, Hao Fu, Yongbai Tang & Mingjing Tu

  2. Department of Physics, National University of Singapore, 117542, Singapore, Republic of Singapore

    Baohua Teng

Authors
  1. Tiebang Zhang
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  2. Yungui Chen
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  3. Hao Fu
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  4. Baohua Teng
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  5. Yongbai Tang
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  6. Mingjing Tu
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Correspondence to Yungui Chen.

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Zhang, T., Chen, Y., Fu, H. et al. The giant magnetocaloric effect in Gd5Si2Ge2 with low purity gadolinium. Chin.Sci.Bull. 50, 1811–1814 (2005). https://doi.org/10.1360/982005-349

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  • DOI: https://doi.org/10.1360/982005-349

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