Anisotropic exchange coupling in the Keggin derivative K8[Co2(D2O)(W11O39)]•nD2O

被引：30

作者：

Andres, H

Aebersold, M

Gudel, HU

Clemente Juan, JM

Coronado, E

Buttner, H

Kearly, G

Zolliker, M

机构：

[1] Univ Bern, Dept Chem & Biochem, CH-3000 Bern 9, Switzerland

[2] Univ Valencia, Dipartamento Quim, E-46100 Burjassot, Spain

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 09, France

[4] Swiss Fed Inst Technol, Lab Neutronenstreuung, CH-5232 Villigen, Switzerland

[5] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 289卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(98)00419-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

20 g of the fully deuterated title compound have been prepared in polycrystalline form and investigated by inelastic neutron scattering using both thermal and cold neutrons, Magnetic dimer excitations were observed and the energy-splitting pattern resulting from the exchange coupling within the Co2+ dimer was determined. The coupling is highly anisotropic with the parameter values J = -2.24 meV and eta = 0.33 based on the effective coupling Hamiltonian (H) over cap = - 2J[S1zS2z + eta(S1xS2x + S1yS2y)]. The anisotropy results mainly from the single-ion anisotropy of the Co2+ ion in the distorted octahedral coordination. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：224 / 230

页数：7

共 20 条

[1] EXCHANGE INTERACTIONS IN MIXED YB3+-CR3+ AND YB3+-HO3+ DIMERS - AN INELASTIC-NEUTRON-SCATTERING INVESTIGATION OF CS3YB1.8CR0.2BR9 AND CS3YB1.8HO0.2BR9 [J].