Nd-ion substitution effect on f-electron multipole order of PrRu4P12
Nd-ion substitution effect on f-electron multipole order of PrRu4P12
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Nd离子取代对PrRu4P12 f电子多极级的影响
DOI：
10.1016/j.phpro.2015.12.193
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Chihiro Sekine and Hitoshi Sugawara
中科院分区：
文献类型：
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作者：
Kazuaki Iwasa;Ari Yonemoto;Shigeru Takagi;Shinichi Itoh;Tetsuya Yokoo;Soshi Ibuka;Chihiro Sekine and Hitoshi Sugawara
研究了磁性Nd离子替代对PrRu_4P_（12）在63 K转变温度下的金属-非金属转变的影响，PrRu_4P_（12）的特征是Pr离子4f电子的反铁电多极有序. Pr_（1-x）Nd_xRu_（4P）_（12）的相变温度与Nd浓度x的依赖性较弱。非弹性中子散射测量表明，Pr 0.85Nd 0.15Ru 4P 12中Pr 4f 2的晶场激发峰的能量和宽度与PrRu 4P 12非常相似。这些实验结果表明，与La和Ce取代相比，有序态对磁性Nd离子的取代是稳健的。Pr_（1-x）Nd_xRu_（4-P）_（12）中Pr离子和Nd离子之间的磁性相互作用有助于稳定Pr离子的磁性三重基态，使其出现在反铁型多极有序相中。因此，PrRu_（4P）_（12）的多极有序相与磁微扰是相容的。
We studied the effect of magnetic Nd-ion substitution on the metal-nonmetal transition at a transition temperature of 63 K of PrRu4P12, which is characterized by antiferro-type electric multipole ordering of Pr-ion 4felectrons. The transition temperature of Pr1-xNdxRu4P12depends weakly on the Nd concentrationxas compared to Laand Ce-substituted compounds. Inelastic neutron-scattering measurements revealed that the energies and widths of crystalline field excitation peaks of Pr 4f2in Pr0.85Nd0.15Ru4P12are very similar to those of PrRu4P12. These experimental results indicate that the ordered state is robust against the substitution of magnetic Nd ions as compared to the La and Ce substitutions. Magnetic interactions between the Pr ions and the Nd ions in Pr1-xNdxRu4P12help stabilize the magnetic triplet ground state of the Pr ions that appears in the antiferro-type multipole ordered phase. Therefore, the nonmagnetic multipole ordered phase of PrRu4P12is compatible with the magnetic perturbation.