Dielectric and magnetic anomalies and spin frustration in hexagonal RMnO3 (R = Y, Yb, and Lu) -: art. no. 104419

被引：418

作者：

Katsufuji, T ^{[1
]}

Mori, S

Masaki, M

Moritomo, Y

Yamamoto, N

Takagi, H

机构：

[1] Univ Tokyo, Dept Adv Mat Sci, Tokyo 1138656, Japan

[2] Univ Tokyo, Dept Appl Chem, Tokyo 1138656, Japan

[3] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

[4] Nagoya Univ, CIRSE, Nagoya, Aichi 4648601, Japan

[5] Nagoya Univ, Dept Crystalline Mat Sci, Nagoya, Aichi 4648601, Japan

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.64.104419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Single crystals of hexagonal RMnO3 (R = Y, Yb, and Lu), where Mn ions form the triangular lattice, were investigated, focusing on their dielectric/magnetic anomalies as well as geometrical spin frustration. It is found that the ratio of a Weiss temperature to T-N is similar to 10 in RMnO3, indicating the dominant role of strong geometrical frustration. The effect of geometrical frustration also appears in specific heat, which shows a presence of a substantial amount of residual magnetic contribution below T-N, indicating that a part of the spins are still fluctuating at T much less thanT(N). It is also found that the dielectric anomaly at T-N is strongly anisotropic, suggesting a unique correlation between magnetism and dielectric properties in these compounds.

引用

页数：6

共 22 条

[1] STRUCTURE MAGNETIQUE DE MNYO3 [J].