Structural and magnetic properties of the new low-dimensional spin magnet InCu2/3V1/3O3

被引：71

作者：

Kataev, V ^{[1
]}

Möller, A

Löw, U

Jung, W

Schittner, N

Kriener, M

Freimuth, A

机构：

[1] IFW Dresden, Leibniz Inst Solid State Mat Res, D-01069 Dresden, Germany

[2] Univ Cologne, Inst Inorgan Chem, D-50939 Cologne, Germany

[3] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

[4] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷

关键词：

low-dimensional magnetism; magnetic susceptibility; quantum Monte-Carlo; ESR;

D O I：

10.1016/j.jmmm.2004.11.204

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report structural and magnetic data of a new transition metal oxide InCu2/3V1/3O3 containing hexagonal planes of magnetic Cu2+ (S = 1/2) ions in a 5-fold trigonal-bipyramidal coordination of oxygen ions. Static magnetic susceptibility and electron spin resonance (ESR) data as well as numerical quantum Monte-Carlo calculations suggest that Cu spins in the layers are strongly antiferromagnetically coupled with J similar to 140 K and form a two-dimensional S = 1/2-Heisenberg honeycomb lattice. Owing to the appreciable interlayer coupling the compound orders magnetically at 38K. Remarkably, ESR gives evidence that the orbital ground state of Cu2+ is not the x(2) - y(2) orbital as in copper oxides with the usual octahedral, square-pyramidal or square-planar coordination, but it is the 3z(2) - r(2) orbital, which is unique for the cuprates. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：310 / 313

页数：4

共 13 条

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