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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 被引量：2

Influence of Ce Valence Fluctuation on the Properties of Pr_(0.1)Ce_xTb_(0.9-x)Fe_(1.9) Compounds
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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.
作者 任芝 李松涛 刘何燕 曹春梅 卢遵铭 翟艳东 李养贤
机构地区 华北电力大学数理学院 河北工业大学材料科学与工程学院 河北工业大学计算机科学与软件学院
出处 《磁性材料及器件》 CSCD 北大核心 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)
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 Pr0.1CexTb0.9-x compounds curve of magnetization magnetostriction Ce valence fluctuation
分类号 TM274 [一般工业技术—材料科学与工程]
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参考文献8

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同被引文献16

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磁性材料及器件
2010年 第3期

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