Current-induced domain wall motion in magnetic nanowires with different dimensions  

作　　者：WU Yong XU XiaoGuang ZHANG DeLin LI XiaoQi YANG HaiLing MIAO Jun JIANG Yong 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第11期2030-2032,共3页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 50831002,50971025,51071022 and 11174031);the Program for Changjiang Scholars and Innovative Research Team in University (Grant No. 2011031);Beijing Municipal Natural Science Foundation (Grant No. 2102032);the Fundamental Research Funds for Central Universities

摘　　要：The current-driven domain wall motion was investigated on permalloy nanowires with different dimensions by micromagnetic simulations.The critical current density increased with the reduction in both the width and thickness of nanowires because of the enhanced hard-axis anisotropy.At a thickness of 5 nm,the critical current density decreased with the reduction of the nanowire width because of the reduced domain wall width.The current-driven domain wall motion was investigated on permalloy nanowires with different dimensions by micromagnetic simulations. The critical current density increased with the reduction in both the width and thickness of nanowires because of the enhanced hard-axis anisotropy. At a thickness of 5 nm, the critical current density decreased with the reduction of the nanowire width because of the reduced domain wall width.

关 键 词：spin-transfer torque hard-axis anisotropy Walker breakdown field 

分 类 号：O484.43[理学—固体物理] TB383[理学—物理]