Structural and magnetic dimers in the spin-gapped system CuTe2O5

被引：55

作者：

Deisenhofer, J. ^{[1
]}

Eremina, R. M.

Pimenov, A.

Gavrilova, T.

Berger, H.

Johnsson, M.

Lemmens, P.

von Nidda, H. -A. Krug

Loidl, A.

Lee, K. -S.

Whangbo, M. -H.

机构：

[1] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva 4, Switzerland

[2] Univ Augsburg, Ctr Elect Correlat & Magnetism, EP V, D-86135 Augsburg, Germany

[3] EK Zavoisky Phys Tech Inst, Kazan 420029, Russia

[4] Ecole Polytech Fed Lausanne, Inst Phys Mat Complexe, CH-1015 Lausanne, Switzerland

[5] Stockholm Univ, Dept Inorgan Chem, S-10691 Stockholm, Sweden

[6] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys Condensed Matter, D-38106 Braunschweig, Germany

[7] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

[8] Catholic Univ Korea, Dept Chem, Gyeonggi Do 422743, South Korea

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.74.174421

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the magnetic properties of the system CuTe2O5 by susceptibility and electron spin resonance (ESR) measurements. The anisotropy of the effective g factors and the ESR linewidth indicates that the anticipated structural dimer does not correspond to the singlet-forming magnetic dimer. Moreover, the spin susceptibility of CuTe2O5 can only be described by taking into account interdimer interactions of the same order of magnitude than the intradimer coupling. Analyzing the exchange couplings in the system we identify the strongest magnetic coupling between two Cu ions to be mediated by a super-superexchange interaction via a bridging Te ligand, while the superexchange coupling between the Cu ions of the structural dimer only results in the second strongest coupling.

引用

页数：8

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