Electromagnons in multiferroic YMn2O5 and TbMn2O5

被引：183

作者：

Sushkov, A. B. ^{[1
]}

Aguilar, R. Valdes

Cheong, S-W

Drew, H. D.

机构：

[1] Univ Maryland, Mat Res Sci & Engn Ctr, College Pk, MD 20742 USA

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.98.027202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on temperature dependent far infrared transmission spectra of YMn2O5 and TbMn2O5 single crystals, we report the observation of electric dipole-active magnetic excitations, or electromagnons, in these multiferroics. Electromagnons are found to be directly responsible for the steplike anomaly of the static dielectric constant at the commensurate-incommensurate magnetic transition and are the origin of the colossal magneto-dielectric effect reported in these multiferroics.

引用

页数：4

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