Microscopic aspects of multipole properties of filled skutterudites

被引：7

作者：

Hotta, Takashi ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

基金：

日本学术振兴会;

关键词：

multipole; filled skutterudites; dynamical Jahn-Teller effect;

D O I：

10.1016/j.jmmm.2006.10.899

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We discuss low-temperature multipole states of Nd-based filled skutterudites by analyzing a multiorbital Anderson model with the use of a numerical renormalization group method. In order to determine the multipole state, we take a procedure to maximize the multipole susceptibility matrix. Then, it is found that the dominant multipole state is characterized by the mixture of 4u magnetic and 5u octupole moments. The secondary state is specified by 2u octupole. When we further take into account the coupling between f electrons in degenerate Gamma(-)(67) (e(u)) orbitals and dynamical Jahn-Teller phonons with E-g symmetry, quadrupole fluctuations become significant at low temperatures in the mixed multipole state with 4u magnetic and 5u octupole moments. Finally, we briefly discuss possible relevance of the present results to actual Nd-based filled skutterudite compounds. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1691 / 1697

页数：7

共 42 条

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