摘要
通过在MnCo_(0.4)Ni_(0.6)Ge中引入Mn空位得到化合物Mn_(0.95)Co_(0.4)Ni_(0.6)Ge,实现了AFM(TiNiSi)-FM(TiNiSi)-FM(Ni_(2)In)-PM(Ni_(2)In)多级相变;195 K时在样品中观察到了从TiNiSi到Ni_(2)In的结构相变;255 K时在样品Mn_(0.95)Co_(0.4)Ni_(0.6)Ge中实现了由顺磁(Ni_(2)In结构)向铁磁(TiNiSi结构)的结构相变;并且发现在外加磁场30 kOe左右时引发场致相变;在195 K(ΔB=5 T)时产生了-17.8 J/(kg·K)的磁熵变(材料制冷能力)。
The compound Mn_(0.95)Co_(0.4)Ni_(0.6)Ge is obtained by introducing Mn vacancies in MnCo_(0.4)Ni_(0.6)Ge compound,which achieves AFM(TiNiSi)-FM(TiNiSi)-FM(Ni_(2)In)-PM(Ni_(2)In)multiple magnetic phase transitions.A paramagnetic(Ni_(2)In-type structure)to ferromagnetic(TiNiSi-type structure)transition is realized near the temperature 255 K.And the field-induced phase transition is induced at about 30 kOe.Furthermore,magnetic entropy change of-17.8 J/(kg·K)at 195 K(ΔB=5 T)is obtained in Mn_(0.95)Co_(0.4)Ni_(0.6)Ge compound.
作者
赵荣霞
ZHAO Rong-xia(College of Science,Binzhou University,Binzhou 256603,China)
出处
《滨州学院学报》
2021年第2期85-88,共4页
Journal of Binzhou University
基金
滨州学院科研基金项目(BZXYG03)。
关键词
结构相变
磁熵变
多极相变
structural transition
magnetic entropy change
multiple magnetic phase transitions
