High-field ESR study of the dimerized-incommensurate phase transition in the spin-Peierls compound CuGeO3

被引：75

作者：

Zvyagin, SA

Krzystek, J

van Loosdrecht, PHM

Dhalenne, G

Revcolevschi, A

机构：

[1] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[2] Univ Groningen, Dept Phys, NL-9747 AG Groningen, Netherlands

[3] Univ Paris 11, Lab Physicochim Etat Solide, F-91405 Orsay, France

来源：

PHYSICA B-CONDENSED MATTER | 2004年 / 346卷

关键词：

CuGeO3; ESR; incommensurability; spin-Peierls transition;

D O I：

10.1016/j.physb.2004.01.009

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dimerized-incommensurate phase transition in the spin-Peierls compound CuGeO3 is probed using the tunable-frequency high-resolution electron spin resonance technique in magnetic fields up to 17 T. A field-induced development of the soliton-like incommensurate superstructure is clearly indicated as a pronounced increase of the magnon spin resonance linewidth DeltaB, with a DeltaB(max) at B-c similar to 13.8 T. The anomaly is explained in terms of the magnon-soliton scattering and suggests that the soliton-like phase exists close to the boundary of the dimerized-incommensurate phase transition. In addition, magnetic excitation spectra in 0.8% Si-doped CuGeO3 are studied. Some features of the high-field high-resolution tunable-frequency ESR facility recently developed in Tallahassee are presented. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：1 / 5

页数：5