Domain wall motion driven by an oscillating magnetic field. (23rd February 2017)

• Record Type: Journal Article
• Authors: Moon, Kyoung-Woong; Kim, Duck-Ho; Kim, Changsoo; Kim, Dae-Yun; Choe, Sug-Bong; Hwang, Chanyong
• Is Part Of: Journal of physics. Volume 50:Number 12(2017)
• Publication Date: 2017-02-23
• Subjects: domain wall motion -- oscillating magnetic field -- chirality -- domain wall width; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/aa5d35
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: The coherent unidirectional motion of magnetic domain walls (DWs) is a key technology used in memory and logic device applications, as demonstrated in magnetic strips by electric current flow as well as in films by oscillation of a tilted magnetic field. Here we introduce a coherent unidirectional motion of DWs in the strip, utilizing an oscillating field, which is described within a previous 1D model. The essential criterion for DW motion in this approach is the oscillating-field-induced modulation of the DW width, which has not been previously considered. This DW motion driven by width modulation sheds light on high frequency domain manipulation in spin devices. A comprehensive inspection of field angle dependence reveals that unidirectional DW motion in this model requires chiral DWs, followed by asymmetric deformation of the domain shape.