Domain Wall Motion by the Magnonic Spin Seebeck Effect
Domain Wall Motion by the Magnonic Spin Seebeck Effect
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DOI：
10.1103/physrevlett.107.027205
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发表时间：
2011-07-08
影响因子：
8.6
通讯作者：
Nowak, U.
中科院分区：
文献类型：
--
作者：
Hinzke, D.;Nowak, U.
最近发现的自旋Seebeck效应是指由铁磁材料中的温度梯度引起的自旋电流。它结合了旋转自由度和卡路里特性，为新的旋转电子设备的发明打开了大门。利用自旋模型模拟和创新的多尺度微磁框架，我们发现由温度梯度引起的磁子自旋电流导致自旋转移扭矩效应，这可以将铁磁纳米结构中的磁畴壁拖向导线的较热部分。这一效应为域结构的控制和操作打开了新的视角。
The recently discovered spin Seebeck effect refers to a spin current induced by a temperature gradient in a ferromagnetic material. It combines spin degrees of freedom with caloric properties, opening the door for the invention of new, spin caloritronic devices. Using spin model simulations as well as an innovative, multiscale micromagnetic framework we show that magnonic spin currents caused by temperature gradients lead to spin transfer torque effects, which can drag a domain wall in a ferromagnetic nanostructure towards the hotter part of the wire. This effect opens new perspectives for the control and manipulation of domain structures.