Softening of magnons in ferromagnetic manganites

被引：2
|
作者：
Schlottmann, P. [1 ]
机构：
[1] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA
来源：
JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 07期
关键词：
SPIN-WAVES; TRANSITION; DYNAMICS; ZONE;
D O I：
10.1063/1.3540345
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnon modes of narrow-band manganites display softening and broadening for large k vectors. We critically review the several models proposed to explain the anomalous dispersions. A mechanism for the softening and shortened lifetime based on the motion of the e(g) electrons that reduces the Hund's rule exchange between the e(g) and t(2g) electron spins is presented. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3540345]
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页数：3
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