Spin Transfer Torques in MnSi at Ultralow Current Densities
Spin Transfer Torques in MnSi at Ultralow Current Densities
复制标题
DOI：
10.1126/science.1195709
复制
发表时间：
2010-12-17
期刊：
影响因子：
56.9
通讯作者：
Rosch, A.
中科院分区：
文献类型：
--
作者：
Jonietz, F.;Muehlbauer, S.;Rosch, A.
利用电流对自旋进行操控是自旋电子学领域最有前途的研究方向之一。我们用中子散射来观察电流对大块材料磁结构的影响。在锰硅的skyrmion晶格中，自旋形成类似于II型超导体中的涡旋晶格的磁涡旋晶格，我们观察到响应于电流的衍射图案的旋转，该电流比通常应用于纳米结构中电流驱动的磁化动力学的实验研究中的电流小五个数量级以上。我们把我们的观察归因于非均匀自旋流与自旋结构中拓扑稳定结的极有效耦合。
Spin manipulation using electric currents is one of the most promising directions in the field of spintronics. We used neutron scattering to observe the influence of an electric current on the magnetic structure in a bulk material. In the skyrmion lattice of manganese silicon, where the spins form a lattice of magnetic vortices similar to the vortex lattice in type II superconductors, we observe the rotation of the diffraction pattern in response to currents that are over five orders of magnitude smaller than those typically applied in experimental studies on current-driven magnetization dynamics in nanostructures. We attribute our observations to an extremely efficient coupling of inhomogeneous spin currents to topologically stable knots in spin structures.