利用自旋霍尔效应进行自旋弛豫的电操控。

Electric manipulation of spin relaxation using the spin Hall effect.

作者信息

Ando K, Takahashi S, Harii K, Sasage K, Ieda J, Maekawa S, Saitoh E

机构信息

Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan.

出版信息

Phys Rev Lett. 2008 Jul 18;101(3):036601. doi: 10.1103/PhysRevLett.101.036601.

DOI:10.1103/PhysRevLett.101.036601

PMID:18764271

Abstract

Using the spin Hall effect, magnetization relaxation in a Ni_{81}Fe_{19}/Pt film is manipulated electrically. An electric current applied to the Pt layer exerts spin torque on the entire magnetization of the Ni81Fe19 layer via the macroscopic spin transfer induced by the spin Hall effect and modulates the magnetization relaxation in the Ni81Fe19 layer. This method allows us to tune the magnetization dynamics regardless of the film size without applying electric currents directly to the magnetic layer.

摘要

利用自旋霍尔效应，可对Ni₈₁Fe₁₉/Pt薄膜中的磁化弛豫进行电操控。施加到Pt层的电流通过自旋霍尔效应诱导的宏观自旋转移，对Ni₈₁Fe₁₉层的整体磁化施加自旋扭矩，并调制Ni₈₁Fe₁₉层中的磁化弛豫。该方法使我们能够在不直接向磁性层施加电流的情况下，无论薄膜尺寸如何，都能调节磁化动力学。