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...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.展开更多
基金supported by the State Key Development Program for Basic Research of China(51562032)and the 2021 Intramural Project(30234013)。
文摘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.
