双钙钛矿型化合物LaK_(0.99)Fe_(1.2)Mo_(0.8)O_6性质的研究  

Large Magnetoresistance,Structure and Magnetic Properties of the Double Perovskite LaK_(0.99)Fe_(1.2)Mo_(0.8)O_6 Compound

作　　者：霍国燕[1] 刘爽[1] 王烨[1] 王玉平[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2006年第3期274-277,282,共5页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金资助项目(B2004000095)

摘　　要：合成了双钙钛矿型氧化物LaK0.99Fe1.2Mo0.8O6,并对它的结构、电磁性质等方面进行了研究.实验表明,此化合物的晶体结构属于立方晶系,空间群为Fm 3m;磁化强度随温度的升高缓慢减小;磁阻效应随着外磁场的增强而增加,当磁场为1.0 T时,磁电阻效应高达0.95,并在所研究的温度范围内基本保持不变.The double perovskite LaK0.99Fe1.2Mo0.8O6 ceramics have been successfully synthesized. The structural, Curie temperature and transport properties of this compound have been studied. Its structure belongs to cubic system with Fm^-3m space group. Magnetization slowly reduced with temperature and large magnetoresistance of the sample under IT field remains constant around 0.95 in the studied temperature range.

关 键 词：双钙钛矿化合物LaK0.99Fe1.2Mo0.8O6 庞磁阻效应 磁性 晶体结构 

分 类 号：O611.62[理学—无机化学]