Magnetocaloric effect in La0.7 NdxBa(0.3-x)MnO3 (x = 0, 0.05, 0.1) perovskite manganites
作者:C.Gökhan Ünlü、Y. Emre Tanış、M. Burak Kaynar、Telem Şimşek、Şadan Özcan
DOI:10.1016/j.jallcom.2017.02.030
日期:2017.5
Abstract We have synthesized La 0.7 Nd x Ba (0.3-x) MnO 3 (x = 0, 0.05, 0.1) perovskite manganites by using sol-gel method and investigated structure, magnetic and magnetocaloric properties. Structural analysis revealed that La 0.7 Ba 0.3 MnO 3 and La 0.7 Nd 0.05 Ba 0.25 MnO 3 have cubic and La 0.7 Nd 0.1 Ba 0.2 MnO 3 rhombohedral structure. The Curie temperature of the samples decreased with increasing
摘要 我们采用溶胶-凝胶法合成了La 0.7 Nd x Ba (0.3-x) MnO 3 (x = 0, 0.05, 0.1) 钙钛矿锰矿,并研究了其结构、磁性和磁热性能。结构分析表明,La 0.7 Ba 0.3 MnO 3 和La 0.7 Nd 0.05 Ba 0.25 MnO 3 具有立方和La 0.7 Nd 0.1 Ba 0.2 MnO 3 菱面体结构。样品的居里温度随着 Nd 含量的增加而降低,x = 0、0.05、0.1 时分别等于 303、293 和 257 K。我们通过使用磁化等温线和热容量测量实验表明,通过调整 Mn 3+ 与 Mn 4+ 的比率,La 0.7 Nd 0.05 Ba 0.25 MnO 3 结构成功实现了室温磁制冷。此外,