TITLE

Condition of the ratchet effect of a magnetic domain wall motion under an asymmetric potential energy

AUTHOR(S)
Piao, Hong-Guang; Zhang, Xiaozhong; Choi, Hyeok-Cheol; Kim, Dong-Hyun; You, Chun-Yeol
PUB. DATE
April 2012
SOURCE
Journal of Applied Physics;Apr2012, Vol. 111 Issue 7, p07D301
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have investigated the ratchet effect of magnetic domain wall (DW) motion in a straight ferromagnetic nanowire under ac magnetic field by means of micromagnetic simulation. A structure-stable DW ratchet effect along the ferromagnetic nanowire is observed utilizing an asymmetric potential produced by a nonuniform magnetostatic stray field from an array of a periodic non-contact trapezoidal stubs. A diode-like consecutive operation process for a transverse DW motion is examined with variation of the ac field frequency and amplitude, where the necessary conditions for the DW ratchet effect are systematically examined. We have also obtained the empirical relation between a DW velocity of the ratchet effect and the ac field frequency and amplitude.
ACCESSION #
74279346

 

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