Physik-Department E21, Technische Universität München, D-85748 Garching, Germany.
Science. 2010 Dec 17;330(6011):1648-51. doi: 10.1126/science.1195709.
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.
利用电流进行自旋操控是自旋电子学领域最有前途的方向之一。我们使用中子散射来观察电流对体材料磁结构的影响。在锰硅的斯格明子晶格中，自旋形成类似于第二类超导体涡旋晶格的磁涡旋晶格，我们观察到衍射图案的旋转响应于电流，这些电流比通常应用于纳米结构中电流驱动磁化动力学实验研究的电流小五个数量级以上。我们将我们的观察结果归因于非均匀自旋电流与自旋结构中拓扑稳定结之间的极其有效的耦合。
