Systematics of electromagnons in the spiral spin-ordered states of RMnO3

被引：34

作者：

Lee, J. S. ^{[1
]}

Kida, N. ^{[1
]}

Miyahara, S. ^{[1
]}

Takahashi, Y. ^{[1
,2
]}

Yamasaki, Y.

Shimano, R. ^{[1
,3
]}

Furukawa, N. ^{[1
,4
]}

Tokura, Y. ^{[1
,2
,5
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Exploratory Res Adv Technol ERATO, Japan Sci & Technol Agcy JST, Tokyo 1138656, Japan

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

[3] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[4] Aoyama Gakuin Univ, Dept Math & Phys, Kanagawa 2298558, Japan

[5] RIKEN, Cross Correlated Mat Res Grp CMRG, ASI, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 18期

关键词：

dysprosium compounds; exchange interactions (electron); gadolinium compounds; magnons; multiferroics; terbium compounds;

D O I：

10.1103/PhysRevB.79.180403

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electromagnon, magnetic excitation driven by an electric field of light, has been investigated for a series of perovskite manganites RMnO3. Two distinct excitations commonly appear in the spiral spin-ordered state, and systematic changes in their peak positions and spectral weights were observed as a function of the radius of the R-ion or equivalently of spin-exchange interaction energies. By comparing the results with the spin-wave calculation based on the Heisenberg model, the higher-lying excitation is assigned to the zone-edge magnon. The strong electric-dipole activity of these magnetic excitations is discussed in terms of dynamic coupling among the collective modes.

引用

页数：4

共 40 条

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