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arXiv 0901.3066cond-mat.mtrl-scicond-mat.str-el
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束缚磁振子在磁畴壁运动中的作用

Role of Bound Magnon in Magnetic Domain Wall Motion

Tae-Suk Kim, J. Ieda, S. Maekawa

摘要:

我们报告的量子描述的磁畴壁(DW)运动下的自旋电流。束缚磁振子,这是DW的零模,被发现在DW动力学中起主导作用。束缚磁振子通过难磁化轴各向异性获得惯性,即使在自旋电流下也是自由粒子。自旋角动量从自旋流通过束缚磁振子完全转移到DW,导致DW以绝热速度运动,自旋波与DW解耦,并且自旋波没有多普勒频移。

英文摘要:

We report on a quantum description of the domain wall (DW) motion under a spin current. A bound magnon, which is the zero mode of DW, is found to play a dominant role in DW dynamics. The bound magnon acquires its inertia by the hard axis anisotropy and is a free particle even under the spin current. The full transfer of spin angular momentum from the spin current to DW via the bound magnon leads to the DW motion with the adiabatic velocity, decoupling of spin waves from DW, and no Doppler shift in spin waves.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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