中国物理B ›› 2024, Vol. 33 ›› Issue (11): 117502-117502.doi: 10.1088/1674-1056/ad6de7

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Magnetocaloric properties of Nd-doped Gd5Si4 microparticles and nanopowders

Kaiyang Zhang(张凯扬), Huanhuan Wang(王欢欢), Ying Wang(王颖)†, and Tao Wang(王涛)‡   

  1. School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2024-05-09 修回日期:2024-08-09 接受日期:2024-08-12 出版日期:2024-11-15 发布日期:2024-11-15
  • 基金资助:
    Project supported by the Natural Science Foundation of Gansu Province (Grant No. 22JR5RA404).

Magnetocaloric properties of Nd-doped Gd5Si4 microparticles and nanopowders

Kaiyang Zhang(张凯扬), Huanhuan Wang(王欢欢), Ying Wang(王颖)†, and Tao Wang(王涛)‡   

  1. School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
  • Received:2024-05-09 Revised:2024-08-09 Accepted:2024-08-12 Online:2024-11-15 Published:2024-11-15
  • Contact: Ying Wang, Tao Wang E-mail:yingw@lzu.edu.cn;wtao@lzu.edu.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Gansu Province (Grant No. 22JR5RA404).

摘要: The preparation of materials with enhanced magnetocaloric properties is crucial for magnetic refrigeration. In this study, Nd-doped Gd$_{5}$Si$_{4}$ microparticles and nanomaterials were synthesized using the reduction-diffusion method. The impact of Nd doping with varying compositions on the structure and entropy change properties of the materials was investigated. The Curie temperatures of both the micron- and nano-sized materials ranged from 190 K to 210 K, which were lower than previously reported values. Micron-sized samples doped with 1% Nd exhibited superior magnetocaloric properties, demonstrating a maximum entropy change of 4.98 J$\cdot $kg$^{-1}\cdot $K$^{-1}$ at 5 T, with an entropy change exceeding 4 J$\cdot $kg$^{-1}\cdot $K$^{-1}$ over a wide temperature range of approximately 70 K. Conversely, the nanomaterials had broader entropy change peaks but lower values. All samples exhibited a second-order phase transition, as confirmed by the Arrott plots.

关键词: magnetocaloric, Gd$_{5}$Si$_{4}$, Nd doping, reduction-diffusion method

Abstract: The preparation of materials with enhanced magnetocaloric properties is crucial for magnetic refrigeration. In this study, Nd-doped Gd$_{5}$Si$_{4}$ microparticles and nanomaterials were synthesized using the reduction-diffusion method. The impact of Nd doping with varying compositions on the structure and entropy change properties of the materials was investigated. The Curie temperatures of both the micron- and nano-sized materials ranged from 190 K to 210 K, which were lower than previously reported values. Micron-sized samples doped with 1% Nd exhibited superior magnetocaloric properties, demonstrating a maximum entropy change of 4.98 J$\cdot $kg$^{-1}\cdot $K$^{-1}$ at 5 T, with an entropy change exceeding 4 J$\cdot $kg$^{-1}\cdot $K$^{-1}$ over a wide temperature range of approximately 70 K. Conversely, the nanomaterials had broader entropy change peaks but lower values. All samples exhibited a second-order phase transition, as confirmed by the Arrott plots.

Key words: magnetocaloric, Gd$_{5}$Si$_{4}$, Nd doping, reduction-diffusion method

中图分类号:  (Magnetocaloric effect, magnetic cooling)

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