Field-induced incommensurate-to-commensurate transition in Ba2CuGe2O7

被引：38

作者：

Zheludev, A ^{[1
]}

Maslov, S

Shirane, G

Sasago, Y

Koide, N

Uchinokura, K

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

[2] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 113, Japan

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.57.2968

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report an observation of a commensurate-incommensurate phase transition in the Dzyaloshinskii-Moriya spiral antiferromagnet Ba2CuGe2O7. The transition is induced by an external magnetic field applied along the c axis of the tetragonal structure, i.e., in the plane of spin rotation. Bulk magnetic measurements and neutron-diffraction experiments show that the transition occurs in a critical field H-c approximate to 2.1 T. Experimental results for the period of the magnetic structure and magnetization as functions of magnetic field are in quantitative agreement with our exact analytical solution for Dzyaloshinskii's model of commensurate-incommensurate transitions in spiral magnets.

引用

页码：2968 / 2978

页数：11

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