Temperature Dependent Magnon-Phonon Coupling in bcc Fe from Theory and Experiment

被引：100

作者：

Koermann, F. ^{[1
]}

Grabowski, B. ^{[1
]}

Dutta, B. ^{[1
]}

Hickel, T. ^{[1
]}

Mauger, L. ^{[2
]}

Fultz, B. ^{[2
]}

Neugebauer, J. ^{[1
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

[2] CALTECH, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 16期

基金：

欧洲研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.113.165503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An ab initio based framework for quantitatively assessing the phonon contribution due to magnon-phonon interactions and lattice expansion is developed. The theoretical results for bcc Fe are in very good agreement with high-quality phonon frequency measurements. For some phonon branches, the magnon-phonon interaction is an order of magnitude larger than the phonon shift due to lattice expansion, demonstrating the strong impact of magnetic short-range order even significantly above the Curie temperature. The framework closes the previous simulation gap between the ferro-and paramagnetic limits.

引用

页数：5

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