Magnetic correlations in single-crystalline CeNi2Ge2

被引：26

作者：

Fak, B ^{[1
]}

Flouquet, J

Lapertot, G

Fukuhara, T

Kadowaki, H

机构：

[1] CEA, Dept Rech Fondamentale Mat Condensee, SPSMS, F-38054 Grenoble, France

[2] Toyama Prefectural Univ, Dept Liberal Arts & Sci, Toyama 93902, Japan

[3] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1020397, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 25期

关键词：

D O I：

10.1088/0953-8984/12/25/307

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The antiferromagnetic correlations in the non-Fermi-liquid compound CeNi2Ge2 have been measured on single crystals using inelastic neutron scattering. The spin fluctuations with a characteristic energy of 4 meV are centred at the incommensurate wave vector (0.23, 0.23, 0.5), which is similar to where magnetic order develops in the related compound CeCu2Ge2. The magnetic correlations are anisotropic, with a quasi-two-dimensional extension along the [110] direction, implying that the moments are mostly correlated in the [110] planes. With increasing temperature, the correlated signal decreases, and above T* approximate to 30 K the magnetic scattering appears to be wave-vector independent.

引用

页码：5423 / 5435

页数：13

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