Charge Dipolar Orderings and Magnetoelastics in Rare Earth Hexaborides
Charge Dipolar Orderings and Magnetoelastics in Rare Earth Hexaborides
复制标题
稀土六硼化物中的电荷偶极有序和磁弹性
DOI：
10.1143/jpsj.66.3864
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发表时间：
1997
影响因子：
1.7
通讯作者：
S. Itabashi
中科院分区：
文献类型：
--
作者：
T. Kasuya;S. Itabashi
基于动态Jahn-Teller效应作为单位效应和配对畸变作为相互作用效应，重新分析了先前测量的Ce x La 1- x b6的磁弹性效应。在稀体系中，我们观察到由于单位效应和对效应之间的竞争而引起的异常居里-魏斯项，而在致密体系中，甚至在顺磁区也观察到由于对形成而引起的异常。配对排序中固有的强烈挫折感起了重要作用。基于上述共同模型对prb6和ndb6的异常性质进行了解释，与实验结果，特别是与异常中子散射测量结果吻合较好。对prb6和ndb6的磁弹性效应也进行了测定。在prb6中，由于近简并的地面层Γ 1和Γ 5之间的畸变引起的混合，这种效应比ceb6强100倍。电荷偶极序…
Magnetoelastic effects measured previously on Ce x La 1- x B 6 were reanalyzed based on the dynamical Jahn-Teller effect as a single site effect and the paired distortion as an interaction effect developed in recent papers for RB 6 in general. In the dilute systems, we observe an anomalous Curie-Weiss term caused from competition between the single site effect and the pair effect, while in the dense systems anomalies due to pair formation are observed even in the paramagnetic region. Strong frustration inherent to the pair ordering plays an important role. Anomalous properties in PrB 6 and NdB 6 were also interpreted based on the above common model in good agreement with the experimental results, in particular with anomalous neutron scattering measurement. Magnetoelastic effects were measured also on PrB 6 and NdB 6 . In PrB 6 the effect is 100 time stronger than that in CeB 6 due to induced mixing through distortions between the nearly degenerated ground levels, Γ 1 and Γ 5 . The charge dipolar ordering ...