Magnetization reversal assisted by half antivortex states in nanostructured circular cobalt disks

Lara, Antonio; Dobrovolskiy, O. V.; Prieto Martin, Jose Luis; Huth, Michael y Aliev, Farkhad G. (2014). Magnetization reversal assisted by half antivortex states in nanostructured circular cobalt disks. "Applied Physics Letters", v. 105 (n. 18); pp.. ISSN 0003-6951. https://doi.org/10.1063/1.4900789.

Descripción

Título: Magnetization reversal assisted by half antivortex states in nanostructured circular cobalt disks
Autor/es:
  • Lara, Antonio
  • Dobrovolskiy, O. V.
  • Prieto Martin, Jose Luis
  • Huth, Michael
  • Aliev, Farkhad G.
Tipo de Documento: Artículo
Título de Revista/Publicación: Applied Physics Letters
Fecha: 2014
Volumen: 105
Materias:
Escuela: E.T.S.I. Telecomunicación (UPM)
Departamento: Electrónica Física
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

Texto completo

[img]
Vista Previa
PDF (Document Portable Format) - Se necesita un visor de ficheros PDF, como GSview, Xpdf o Adobe Acrobat Reader
Descargar (1MB) | Vista Previa

Resumen

The half antivortex, a fundamental topological structure which determines magnetization reversal of submicron magnetic devices with domain walls, has been suggested also to play a crucial role in spin torque induced vortex core reversal in circular disks. Here, we report on magnetization reversal in circular disks with nanoholes through consecutive metastable states with half antivortices. In-plane anisotropic magnetoresistance and broadband susceptibility measurements accompanied by micromagnetic simulations reveal that cobalt (Co) disks with two and three linearly arranged nanoholes directed at 45° and 135° with respect to the external magnetic field show reproducible step-like changes in the anisotropic magnetoresistance and magnetic permeability due to transitions between different intermediate states mediated by vortices and half antivortices confined to the dot nanoholes and edges, respectively. Our findings are relevant for the development of multi-hole based spintronic and magnetic memory devices.

Más información

ID de Registro: 35883
Identificador DC: http://oa.upm.es/35883/
Identificador OAI: oai:oa.upm.es:35883
Identificador DOI: 10.1063/1.4900789
URL Oficial: http://scitation.aip.org/content/aip/journal/apl/105/18/10.1063/1.4900789
Depositado por: Memoria Investigacion
Depositado el: 27 Jun 2015 11:38
Ultima Modificación: 27 Jun 2015 11:38
  • Open Access
  • Open Access
  • Sherpa-Romeo
    Compruebe si la revista anglosajona en la que ha publicado un artículo permite también su publicación en abierto.
  • Dulcinea
    Compruebe si la revista española en la que ha publicado un artículo permite también su publicación en abierto.
  • Recolecta
  • e-ciencia
  • Observatorio I+D+i UPM
  • OpenCourseWare UPM