Magnonic domain wall heat conductance in ferromagnetic wires.
Magnonic domain wall heat conductance in ferromagnetic wires.
复制标题
DOI：
10.1103/physrevlett.109.087202
复制
发表时间：
2012-04
影响因子：
8.6
通讯作者：
P. Yan;G. Bauer
中科院分区：
文献类型：
--
作者：
P. Yan;G. Bauer
本文从理论上研究了含有畴壁的电绝缘铁磁线中磁振子介导的热输运。在连续微磁学的有效性制度，DW被发现对热导没有影响。然而，自旋波被发现与几个晶格间距的宽度，这是与出现一个额外的自旋波束缚态的DW反射。所产生的DW热传导应该是显着的钇铁石榴石薄膜具有明确定义的磁畴。
We present a theoretical study of magnon-mediated heat transport in electrically insulating ferromagnetic wires containing a domain wall (DW). In the regime of validity of continuum micromagnetism, a DW is found to have no effect on the heat conductance. However, spin waves are found to be reflected by DWs with widths of a few lattice spacings, which is associated with emergence of an additional spin wave bound state. The resulting DW heat conductance should be significant for thin films of yttrium iron garnet with sharply defined magnetic domains.