Field-induced reentrant novel phase and a ferroelectric-magnetic order coupling in HoMnO3 -: art. no. 087204

被引：189

作者：

Lorenz, B ^{[1
]}

Litvinchuk, AP

Gospodinov, MM

Chu, CW

机构：

[1] Univ Houston, Dept Phys, Houston, TX 77204 USA

[2] Univ Houston, TCSAM, Houston, TX 77204 USA

[3] Bulgarian Acad Sci, Inst Solid State Phys, BU-1784 Sofia, Bulgaria

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[5] Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.92.087204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A reentrant novel phase is observed in the hexagonal ferroelectric HoMnO3 in the presence of magnetic fields in the temperature range defined by a plateau of the dielectric constant anomaly. The plateau evolves with fields from a narrow dielectric peak at the Mn-spin rotation transition at 32.8 K in zero field. The anomaly appears both as a function of temperature and as a function of magnetic field without detectable hysteresis. This is attributed to the indirect coupling between the ferroelectric (FE) and antiferromagnetic (AFM) orders, arising from an FE-AFM domain wall effect.

引用

页数：4

共 14 条

[1]

Birss R. R., 1966, Symmetry and Magnetism

[2] Determination of the magnetic symmetry of hexagonal manganites by second harmonic generation [J].