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arXiv 1605.04543cond-mat.mtrl-sci
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热感生磁子自旋电流的传播

Propagation of Thermally Induced Magnonic Spin Currents

Ulrike Ritzmann, Denise Hinzke, Ulrich Nowak

摘要:

在随机Landau-Lifshitz-Gilbert方程为基础的运动方程的原子自旋模型框架下,研究了磁振子在温度梯度中的传播.我们分析了磁振子的积累、磁振子温度分布以及激发磁振子的传播长度。所产生的磁振子的频率分布进行了调查,以推导出的各向异性和阻尼参数上的磁振子传播长度的影响的表达式。对于具有低阻尼的软铁磁绝缘体,对于交换驱动的磁振子,可以预期在一些$μ$ m范围内的传播长度。

英文摘要:

The propagation of magnons in temperature gradients is investigated within the framework of an atomistic spin model with the stochastic Landau-Lifshitz-Gilbert equation as underlying equation of motion. We analyze the magnon accumulation, the magnon temperature profile as well as the propagation length of the excited magnons. The frequency distribution of the generated magnons is investigated in order to derive an expression for the influence of the anisotropy and the damping parameter on the magnon propagation length. For soft ferromagnetic insulators with low damping a propagation length in the range of some $μ$m can be expected for exchange driven magnons.

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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