Nonlinear domain-wall velocity enhancement by spin-polarized electric current |
| |
Authors: | Beach G S D Knutson C Nistor C Tsoi M Erskine J L |
| |
Affiliation: | Department of Physics, The University of Texas at Austin, Austin, TX 78712-0264, USA. gbeach@physics.utexas.edu |
| |
Abstract: | The interaction between a dc spin-polarized electric current and a magnetic domain wall in a Permalloy nanowire was studied by high-bandwidth scanning Kerr polarimetry. The full functional dependence of wall velocity on electric current and magnetic field is presented. With the pinning potential nulled by a field, current-induced velocity enhancements exceeded 35 m/s at a current density of approximately 6 x 10(11) A/m(2). This large enhancement, more than 10 times that found in pinning-dominated experiments, results in part from an interaction that is nonlinear in current and independent of current direction. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|