Cooperative ordering of gapped and gapless spin networks in Cu2Fe2Ge4O13 -: art. no. 077202

被引：46

作者：

Masuda, T ^{[1
]}

Zheludev, A

Grenier, B

Imai, S

Uchinokura, K

Ressouche, E

Park, S

机构：

[1] Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA

[2] CEA Grenoble, DRFMC, SPSMS, MDN, F-38054 Grenoble, France

[3] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778581, Japan

[4] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 07期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.93.077202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The unusual magnetic properties of a novel low-dimensional quantum ferrimagnet Cu2Fe2Ge4O13 are studied using bulk methods, neutron diffraction, and inelastic neutron scattering. It is shown that this material can be described in terms of two low-dimensional quantum spin subsystems, one gapped and the other gapless, characterized by two distinct energy scales. Long-range magnetic ordering observed at low temperatures is a cooperative phenomenon caused by weak coupling of these two spin networks.

引用

页码：077202 / 1

页数：4

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