Magnetocaloric properties of Nd-doped Gd_(5)Si_(4) microparticles and nanopowders  

作　　者：Kaiyang Zhang Huanhuan Wang Ying Wang Tao Wang 张凯扬;王欢欢;王颖;王涛(School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China

出　　处：《Chinese Physics B》2024年第11期396-402,共7页中国物理B（英文版）

基　　金：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 thisstudy, Nd-doped Gd5Si4 microparticles and nanomaterials were synthesized using the reduction–diffusion method. Theimpact 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 lowerthan previously reported values. Micron-sized samples doped with 1% Nd exhibited superior magnetocaloric properties,demonstrating a maximum entropy change of 4.98 J·kg^(-1)·K^(-1) at 5 T, with an entropy change exceeding 4 J·kg^(-1)·K^(-1)over a wide temperature range of approximately 70 K. Conversely, the nanomaterials had broader entropy change peaks butlower 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 

分 类 号：O469[理学—凝聚态物理]