Current detection of vortex motion in patterned S-shape wires with constrictions

Yi Chun Chen, Yeong Der Yao, Shang Fan Lee, Yu An Lin, Dong Cheng Chen, Yung Liou

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The current-driven effect on the vortex domain wall in a series-connected permalloy S-shape patterns was investigated. When a domain wall is initially formed in the wire section, in contrast to the ac result, applying a low dc current (J∼ 105 A cm2) will break the degeneracy of the switching energy in different connected sections. Moreover, three kinds of effects on vortex states are observed by applying a high dc current (J∼ 107 A cm2). The current applied slightly below the original switching field will drive vortices to constrictions while the current applied far below the original switching field will only perturb the vortex to another stable state. At the fields slightly over the original switching field, the domain walls are initially trapped at constrictions, injecting current will cause both the depinning and deformation of vortices.

Original languageEnglish
Article number08G306
JournalJournal of Applied Physics
Volume99
Issue number8
DOIs
Publication statusPublished - 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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