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Chin. Phys. B, 2024, Vol. 33(11): 117502    DOI: 10.1088/1674-1056/ad6de7
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev  

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
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.
Keywords:  magnetocaloric      Gd$_{5}$Si$_{4}$      Nd doping      reduction-diffusion method  
Received:  09 May 2024      Revised:  09 August 2024      Accepted manuscript online:  12 August 2024
PACS:  75.30.Sg (Magnetocaloric effect, magnetic cooling)  
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

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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