Ce离子的变价行为对Pr_(0.1)Ce_xTb_(0.9-x)Fe_(1.9)化合物性能的影响  

Influence of Ce Valence Fluctuation on the Properties of Pr_(0.1)Ce_xTb_(0.9-x)Fe_(1.9) Compounds

作　　者：任芝[1] 李松涛[1] 刘何燕[2] 曹春梅[1] 卢遵铭[2] 翟艳东[3] 李养贤[2] 

机构地区：[1]华北电力大学数理学院,河北保定071003 [2]河北工业大学材料科学与工程学院,天津300130 [3]河北工业大学计算机科学与软件学院,天津300130

出　　处：《磁性材料及器件》2010年第3期26-28,共3页Journal of Magnetic Materials and Devices

基　　金：华北电力大学科研基金资助项目(200912005)

摘　　要：用电弧炉熔炼法制备了Pr0.1CexTb0.9-xFe1.9(x=0.2～0.8)化合物。分别采用X射线衍射(XRD)、超导量子干涉磁强计(SQUID)和应变仪分析了化合物Pr0.1CexTb0.9-xFe1.9的相结构、低温磁化曲线和磁致伸缩性能。发现Ce含量x在0.6附近时,Pr0.1CexTb0.9-xFe1.9化合物的晶格常数正向偏离了Vegard定理;低温磁化曲线和磁致伸缩在Ce含量x为0.6时出现反常增加的现象。Pr0.1CexTb0.9-xFe1.9化合物的晶格常数、磁化曲线和磁致伸缩的反常变化归因于Ce离子的价态波动。Pr0.1CexTb0.9-x （x=0.2～0.8） compounds were prepared by arc melting. The phase structure,low-temperature magnetization and magnetostriction of Pr0.1CexTb0.9-x compounds were investigated by XRD,SQUID and strain gauge techniques. When Ce content x is near 0.6,the lattice parameter exhibits positive deviation from Vegard＇s law; magnetization at 5K and magnetostriction abnormally increase. These abnormal changes of lattice parameter,magnetization and magnetostriction can be attributed to the valence fluctuation of Ce ions.

关 键 词：Pr0.1CexTb0.9-xFe1.9化合物 磁化曲线 磁致伸缩 Ce离子价态波动 

分 类 号：TM274[一般工业技术—材料科学与工程]