Wessely Ola, Skubic Björn, Nordström Lars
Department of Physics, Uppsala University, Box 530, SE-75121 Uppsala, Sweden.
Phys Rev Lett. 2006 Jun 30;96(25):256601. doi: 10.1103/PhysRevLett.96.256601. Epub 2006 Jun 27.
A mechanism is proposed for manipulating the magnetic state of a helical spin density wave using a current. It is shown that a current through a bulk metal with a helical spin density wave induces a spin transfer torque, which gives rise to a rotation of the order parameter. The use of spin transfer torque to manipulate the magnetization in bulk systems does not suffer from the obstacles seen for magnetization reversal using interface spin transfer torque in multilayered systems. The effect is demonstrated by a quantitative calculation of the current induced magnetization dynamics of a rare earth metal, Er. Finally, we propose a setup for experimental verification.
提出了一种利用电流操纵螺旋自旋密度波磁态的机制。结果表明，通过具有螺旋自旋密度波的块状金属的电流会诱导自旋转移力矩，从而导致序参量的旋转。在块状系统中使用自旋转移力矩来操纵磁化不会受到多层系统中使用界面自旋转移力矩进行磁化反转时所遇到的障碍的影响。通过对稀土金属铒的电流感应磁化动力学进行定量计算，证明了这种效应。最后，我们提出了一个用于实验验证的装置。
