Influence of thermal gradients and spin currents on current driven domain wall motion

热梯度和自旋电流对电流驱动畴壁运动的影响

• 批准号: 22760015
• 负责人: HAYASHI Masamitsu
• 金额: $ 2.75万
• 依托单位: National Institute for Materials Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760015/
• 关键词: スピントロニクス; 磁壁移動; スピントルク; スピン流; 磁性材料; 磁化ダイナミクス; 熱流

We have studied the effect of temperature gradient and/or spin wave application to reduce the threshold current density needed to move a magnetic domain wall, or to increase the wall velocity. Using joule heating to locally heat a conductor, we developed a system that has temperature gradient of 0.2K/5 um. Spin wave excitations and its detection was carried out using high frequency electrical measurements. Incidentally, we find that the domain wall nucleation field was reduced when a localized microwave field, near to the ferromagnetic resonance frequency, was applied. However, the field driven domain wall velocity showed little dependence on the application of the propagating spin waves.

我们研究了温度梯度和/或自旋波应用对降低移动磁畴壁所需的阈值电流密度或增加壁速度的影响。利用焦耳加热局部加热导体，我们开发了一个温度梯度为0.2K/5 um的系统。自旋波激发及其检测采用高频电测量。同时，我们发现在接近铁磁共振频率的局域微波场作用下，畴壁成核场减小。然而，场驱动的畴壁速度对传播自旋波的应用几乎没有依赖性。

项目成果

Microwave assisted resonant domain wall nucleation in permalloy nanowires

• DOI: 10.1063/1.4764053
• 发表时间: 2012-10
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: M. Hayashi;Y. Takahashi;S. Mitani

Spin wave modulation via interference for magnonic logic circuits

通过干扰进行磁波逻辑电路的自旋波调制

• 发表时间: 2011
• 作者: S. S. Mukherjee;J. Kwon;M. Jamali;M. Hayashi and H. Yang
• 通讯作者: M. Hayashi and H. Yang

Spin Wave Interference Induced by Two Pulses

两个脉冲引起的自旋波干涉

• 发表时间: 2012
• 作者: J. Kwon;S. Mukherjee;M. Jamali;M. Hayashi and H. Yang
• 通讯作者: M. Hayashi and H. Yang

Interference-mediated modulation of spin waves

• DOI: 10.1103/physrevb.85.224408
• 发表时间: 2012-06-11
• 期刊: PHYSICAL REVIEW B
• 影响因子: 3.7
• 作者: Mukherjee, Sankha Subhra;Kwon, Jae Hyun;Yang, Hyunsoo
• 通讯作者: Yang, Hyunsoo