Uniaxial stress control of skyrmion phase.
Uniaxial stress control of skyrmion phase.
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DOI：
10.1038/ncomms9539
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发表时间：
2015-10-13
影响因子：
16.6
通讯作者：
Iwasa Y
中科院分区：
文献类型：
--
作者：
Nii Y;Nakajima T;Kikkawa A;Yamasaki Y;Ohishi K;Suzuki J;Taguchi Y;Arima T;Tokura Y;Iwasa Y
磁skyrmions是一种纳米自旋结构，由于其在未来存储技术和新兴电磁学领域的潜在应用而越来越受到人们的关注。尽管有各种各样的理论建议指向基于skyrmions的电子学（即skyrmionics），但很少有实验成功地创建，删除和转移skyrmions，并且操作方法到目前为止仍然局限于电，磁和热刺激。在这里，我们展示了一种基于机械应力的skyrmion相控制的新方法。通过在低温下连续扫描单轴应力，我们可以在一个典型的手性磁铁MnSi中产生和湮灭一个斯基米子晶体。临界应力仅为几十兆帕，这是很容易达到使用传统悬臂的尖端。目前的结果为单粒子控制提供了新的指导方针，这种控制既不需要电偏也不需要磁偏，并且消耗的能量极小。手性磁体可以支持被称为skyrmions的粒子状磁化纹理，这种纹理在晶格中形成，可以用于潜在的设备应用。在这里，作者展示了利用机械应力在MnSi单晶中控制skyrmion晶格的产生和湮灭。
Magnetic skyrmions, swirling nanometric spin textures, have been attracting increasing attention by virtue of their potential applications for future memory technology and their emergent electromagnetism. Despite a variety of theoretical proposals oriented towards skyrmion-based electronics (that is, skyrmionics), few experiments have succeeded in creating, deleting and transferring skyrmions, and the manipulation methodologies have thus far remained limited to electric, magnetic and thermal stimuli. Here, we demonstrate a new approach for skyrmion phase control based on a mechanical stress. By continuously scanning uniaxial stress at low temperatures, we can create and annihilate a skyrmion crystal in a prototypical chiral magnet MnSi. The critical stress is merely several tens of MPa, which is easily accessible using the tip of a conventional cantilever. The present results offer a new guideline even for single skyrmion control that requires neither electric nor magnetic biases and consumes extremely little energy. Chiral magnets can support particle-like magnetization textures called skyrmions which form in lattices and can be manipulated for potential device applications. Here, the authors demonstrate the controlled creation and annihilation of a skyrmion lattice in MnSi single crystals using mechanical stress.