"Reverse" Magnetostriction Effects in the [001] Shape Magnetostriction of Ce_{x}La_{1-x}Sb and Sm_{x}La_{1-x}Sb Single Crystals
"Reverse" Magnetostriction Effects in the [001] Shape Magnetostriction of Ce_{x}La_{1-x}Sb and Sm_{x}La_{1-x}Sb Single Crystals
复制标题
Ce_{x}La_{1-x}Sb和Sm_{x}La_{1-x}Sb单晶的[001]形磁致伸缩中的“反向”磁致伸缩效应
DOI：
10.1103/physrevlett.49.1202
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
H. Häfner
中科院分区：
文献类型：
--
作者：
G. Nieuwenhuys;D. Davidov;H. Häfner
测量了RxLa1−xSb中所有磁性稀土离子R沿[0 0 1]方向的形状磁致伸缩。在低温下，Ce和Sm的磁致伸缩都与高温相反。晶场模型可以用四极算符<；O^20>；的期望值的符号反转来解释这一现象。这些数据与所有稀土离子的负二阶磁弹性耦合常数V23相一致。
Shape magnetostriction measurements along the [001] direction were carried out for all the magnetic rare-earth ions, R, in R x La 1− x Sb. At low temperatures the magnetostriction of both Ce and Sm are" reversed" with respect to the high temperatures. A crystal-field model can explain this phenomenon by the sign reversal of the expectation value of the quadrupole operator< O^ 2 0>. The data are consistent with a negative second-order magnetoelastic coupling constant, V 2 3, for all the rare-earth ions.