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.

我们已经研究了温度梯度和/或自旋波应用的效果，以减少移动磁畴壁所需的阈值电流密度，或增加壁速度。利用焦耳热局部加热导体，我们开发了一个系统，具有0.2K/5 μ m的温度梯度。自旋波的激发和检测是使用高频电测量进行的。顺便说一句，我们发现，畴壁形核场减少时，局部微波场，附近的铁磁共振频率，被施加。然而，场驱动的畴壁速度表现出很小的依赖性的应用程序的传播自旋波。

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

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

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