Specific-heat evidence for octupolar ordering in SmRU4P12

被引：34

作者：

Aoki, Yuji ^{[1
]}

Sanada, Shotaro ^{[1
]}

Kikuchi, Daisuke ^{[1
]}

Sugawara, Hitoshi ^{[1
]}

Sato, Hideyuki ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2007年 / 76卷 / 11期

关键词：

filled skutterudite; SmRU4P12; octupole ordering; nuclear specific heat;

D O I：

10.1143/JPSJ.76.113703

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measured specific heat in the anomalous ordered phase (T < 16.5K) of filled skutterudite SmRU4P12. From the hyperfine-enhanced Sm nuclear contribution, the ordered Sm dipole moment has been accurately determined to be 0.29 +/- 0.01 mu(B), which is strongly reduced for usual dipolar ordering. We demonstrate that this finding along with other physical quantities provide strong evidence that the primary order parameter is Gamma(4u)-type octupole. The ordered state provides the first example of an octupolar ordering accompanied by nonzero parasitic dipole moments.

引用

页数：4

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