La impurity effects on quadrupolar ordering in PrPb 3
La impurity effects on quadrupolar ordering in PrPb 3
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La 杂质对 PrPb 3 中四极有序性的影响
DOI：
10.1103/physrevb.65.012409
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发表时间：
2001
影响因子：
3.7
通讯作者：
T. Kitai
中科院分区：
文献类型：
--
作者：
T. Kawae;M. Shimogai;M. Mito;K. Takeda;H. Ishii;T. Kitai
研究了Pr 1 -xLaxPb 3的低温性质，基态为非Kramers的Γ 3（0≤x ≤0.8）.从比热的浓度依赖性，四极有序预计只会发生x ≤ 0.02。对于宽范围的La浓度的有序是不存在的，比热显示T线性变化，这是在一个很好的协议与非晶材料的模型与随机配置的二能级系统的结果。将讨论杂质对四极矩的影响。
We study low-temperature properties of Pr 1 - x La x Pb 3 with the ground state of a non-Kramers Γ 3 for 0≤x ≤0.8. From the concentration dependence of the specific heat, quadrupolar ordering is expected to occur only up to x∼0.02. For a wide range of La concentrations where the ordering is absent, the specific heat shows a T linear variation, which is in an excellent agreement with the result obtained by the model for amorphous materials with a random configuration of a two-level system. Impurity effects on quadrupolar moments will be discussed.