| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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)‡ |
| School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China |
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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.
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Received: 09 May 2024
Revised: 09 August 2024
Accepted manuscript online: 12 August 2024
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PACS:
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75.30.Sg
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(Magnetocaloric effect, magnetic cooling)
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| Fund: Project supported by the Natural Science Foundation of Gansu Province (Grant No. 22JR5RA404). |
Corresponding Authors:
Ying Wang, Tao Wang
E-mail: yingw@lzu.edu.cn;wtao@lzu.edu.cn
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Cite this article:
Kaiyang Zhang(张凯扬), Huanhuan Wang(王欢欢), Ying Wang(王颖), and Tao Wang(王涛) Magnetocaloric properties of Nd-doped Gd5Si4 microparticles and nanopowders 2024 Chin. Phys. B 33 117502
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