Magnons and Magnon-Phonon Interactions in Iron
Magnons and Magnon-Phonon Interactions in Iron
复制标题
铁中的磁振子和磁振子-声子相互作用
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
S. Jaswal
中科院分区：
文献类型：
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作者：
R. Sabiryanov;S. Jaswal
在绝热近似下，对体心立方和面心立方铁中的磁振子和磁振子-声子相互作用进行了第一性原理研究。结果表明，声子对体心立方铁磁振子的影响较小，因此晶格振动对居里温度的贡献较小。fcc Fe对磁振子激发是不稳定的，但声子似乎降低了这种不稳定性。磁振子-声子相互作用的分析作为原子间距离的函数的对交换相互作用的变化。fcc结果表明，薄膜或纳米结构形式的亚稳态fcc Fe应该具有有趣的磁性。{版权} {美国物理学会}
First-principle studies of magnons and magnon-phonon interactions are carried out in bcc and fcc iron in the adiabatic approximation. It is shown that the phonons have a minor effect on magnons in bcc Fe and thus the lattice vibrations make a small contribution to the Curie temperature. fcc Fe is unstable against magnon excitations but the phonons seem to reduce this instability. The magnon-phonon interactions are analyzed in terms of the pair-exchange interaction variations as functions of the interatomic distances. The fcc results suggest that metastable fcc Fe in thin-film or nanostructure form should have interesting magnetic properties. {copyright} {ital 1999} {ital The American Physical Society}