Influence of asymmetry on vortex nucleation and annihilation in submicroscaled permalloy disk array

Kuo Ming Wu, Lance Horng, Jia Feng Wang, Jong Ching Wu, Yin Hao Wu, Ching Ming Lee

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Magnetic properties of vortex nucleation, annihilation, and switching field distribution (SFD) in NiFe disk arrays, where the elements are with 300 nm diameter and different degrees of asymmetry, were investigated through measurements and simulations of hysteresis loop. The nucleation and annihilation of vortex state show strong dependences on the asymmetry. More interestingly, the width of SFD, the crucial factor for high-density storage application, oscillating with the degree of asymmetry is observed. The simulation results agree well with the experimental data.

Original languageEnglish
Article number262507
JournalApplied Physics Letters
Volume92
Issue number26
DOIs
Publication statusPublished - 2008 Jul 11

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Influence of asymmetry on vortex nucleation and annihilation in submicroscaled permalloy disk array'. Together they form a unique fingerprint.

  • Cite this