Direct and quantitative determination of the orbital ordering in CeB6 by X-ray diffraction

被引：43

作者：

Tanaka, Y ^{[1
]}

Staub, U

Katsumata, K

Lovesey, SW

Lorenzo, JE

Narumi, Y

Scagnoli, V

Shimomura, S

Tabata, Y

Onuki, Y

Kuramoto, Y

Kikkawa, A

Ishikawa, T

Kitamura, H

机构：

[1] RIKEN, SPring 8, Sayo, Hyogo 6795148, Japan

[2] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[3] Rutherford Appleton Lab, Diamond Light Source, Didcot OX11 0QX, Oxon, England

[4] CNRS, Cristallog Lab, F-38042 Grenoble, France

[5] Osaka Univ, KYOKUGEN, Osaka 5608531, Japan

[6] Keio Univ, Fac Sci & Technol, Dept Phys, Yokohama, Kanagawa 2238522, Japan

[7] Osaka Univ, Grad Sch Sci, Osaka 5600043, Japan

[8] Tohoku Univ, Grad Sch Sci, Sendai, Miyagi 9808578, Japan

来源：

EUROPHYSICS LETTERS | 2004年 / 68卷 / 05期

关键词：

D O I：

10.1209/epl/i2004-10271-9

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Results of non-resonant X-ray Bragg diffraction by CeB6 are reported. This material has been described in terms of a simple antiferro-quadrupolar order below T-Q=3.2 K. We determine for the first time, directly and quantitatively the orbital ordering in this material. In particular, we find direct evidence for a simultaneous ordering of a quadrupole (QP) and a hexadecapole (HDP) moments below T-Q. From a strong dependence of the Bragg intensity on applied magnetic field in phase II, we conclude that octupole (OP) moments are induced and are coupled to the QP and HDP moments. When spontaneous magnetic dipole order sets in below T-N=2.4K (phase III), a large enhancement of the Bragg intensity confirms the coupling between the dipole and the QP, OP and HDP moments.

引用

页码：671 / 677

页数：7

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