Dynamic micromagnetic simulation of domain wall around the Walker breakdown in ferromagnetic nanowires driven magnetic pulse

Dede Djuhana, Azwar Manaf, A. Sumarta, Mardona, D. H. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We have investigated the domain wall dynamic around the Walker breakdown field in ferromagnetic nanowires by means of micromagnetic simulation. The simulation is driven by short magnetic pulse 1-ns length with a systematic variation of applied magnetic strength. Interestingly, it is found that the domain wall structure exhibits transverse domain wall structure before the Walker breakdown field while the vortex/antivortex domain wall structure after the Walker breakdown field. The domain wall velocity increases as the applied field strength increases before the Walker breakdown field and decreases after the Walker breakdown field. The Walker breakdown field decreases as the width and the thickness of nanowires increases. We also analyzed the energy magnetization density system around the Walker breakdown field. It is revealed that the magnetostatic energy dominates of the energy system and the exchange energy tendency increases as the vortex/antivortex structures is formed in ferromagnetic nanowires.

Original languageEnglish
Title of host publication4th International Conference on Mathematics and Natural Sciences, ICMNS 2012
Subtitle of host publicationScience for Health, Food and Sustainable Energy
PublisherAmerican Institute of Physics Inc.
Pages262-265
Number of pages4
ISBN (Print)9780735412217
DOIs
Publication statusPublished - 1 Jan 2014
Event4th International Conference on Mathematics and Natural Sciences: Science for Health, Food and Sustainable Energy, ICMNS 2012 - Bandung, Indonesia
Duration: 8 Nov 20129 Nov 2012

Publication series

NameAIP Conference Proceedings
Volume1589
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Conference on Mathematics and Natural Sciences: Science for Health, Food and Sustainable Energy, ICMNS 2012
Country/TerritoryIndonesia
CityBandung
Period8/11/129/11/12

Keywords

  • ferromagnetic nanowire
  • Micromagnetic
  • transverse wall
  • vortex/antivortex wall
  • Walker breakdown

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