摘要
In this study,a novel method is proposed for producing perovskite rare-earth manganese oxide magnetic refrigeration materials that exhibit superior properties compared to similar materials.The maximum magnetic entropy change values for this sample are 1.44 and 3.75 J·kg-1·K^(-1)for magnetic fields of 2 and 7 T,respectively.Additionally,its relative cooling power has been calculated to be 101.96 and 404.78 J·kg^(-1),indicating good performance.Both results were obtained using the sample synthesized under a pressure of 4 GPa,and the sample has undergone a second phase transition.The critical behavior of the sample fits well with the mean field model.For different magnetic fields,there is a significant overlap between the values of the maximum magnetic entropy change and the temperature-averaged entropy change,indicating that the refrigeration performance of the sample after high pressure can approach its maximum capability.
出处
《Tungsten》
EI
CSCD
2024年第3期621-632,共12页
钨科技（英文）
基金
supported by the State Key Development Program for Basic Research of China(51562032)
the 2021 Intramural Project(30234013)。
作者简介
Xiang Jin,jin122120@163.com;Luo-Meng Chao,2017993@imust.edu.cn。;Jing Zhao,are contributed equally to this work;Lei Gao,are contributed equally to this work.
