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Modification of domain-wall propagation in Co nanowires via Ga + irradiation

Author

Listed:
  • Luis Serrano-Ramón
  • Amalio Fernández-Pacheco
  • Manuel Ricardo Ibarra
  • Dorothée Petit
  • Russell P. Cowburn
  • Tolek Tyliszczak
  • José Teresa

Abstract

The propagation of domain walls in polycrystalline Co nanowires grown by focused-electron-beam-induced deposition is explored. We have found that Ga + irradiation via focused ion beam is a suitable method to modify the propagation field of domain walls in magnetic conduits. Magneto-optical Kerr effect measurements show that global Ga + irradiation of the nanowires increases the domain-wall propagation field. Additionally, we have observed by means of scanning transmission X-ray microscopy that it is possible to produce substantial domain-wall pinning via local Ga + irradiation of a narrow region of the nanowire. In both cases, Ga + doses of the order of 10 16 ions/cm 2 are required to produce such effects. These results pave the way for the controlled manipulation of domain walls in Co nanowires via Ga + irradiation. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Suggested Citation

  • Luis Serrano-Ramón & Amalio Fernández-Pacheco & Manuel Ricardo Ibarra & Dorothée Petit & Russell P. Cowburn & Tolek Tyliszczak & José Teresa, 2013. "Modification of domain-wall propagation in Co nanowires via Ga + irradiation," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 86(3), pages 1-6, March.
    • Handle: RePEc:spr:eurphb:v:86:y:2013:i:3:p:1-6:10.1140/epjb/e2013-30926-5
    DOI: 10.1140/epjb/e2013-30926-5
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