Magnon linewidth broadening due to magnon-phonon interactions in colossal magnetoresistance manganites

被引：31

作者：

Furukawa, N ^{[1
]}

机构：

[1] Aoyama Gakuin Univ, Dept Phys, Tokyo 1578572, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1999年 / 68卷 / 08期

关键词：

colossal magnetoresistance manganites; zone boundary magnon broadening; magnon-phonon interaction;

D O I：

10.1143/JPSJ.68.2522

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In order to study the magnetic excitation behaviors in colossal magnetoresistance manganites, a magnon-phonon interacting system is investigated. Sudden broadening of the magnon linewidth is obtained when a magnon branch crosses over an optical phonon branch. Onset of the broadening is approximately determined by the magnon density of states. Anomalous magnon damping at the Brillouin zone boundary observed in low Curie temperature manganites is explained.

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页码：2522 / 2525

页数：4

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