Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Selective injection of magnetic domain walls in Permalloy nanostripes
Year:2014
Research Areas
  • Magnetic materials
Information
Abstract
This work explores the conditions that allow the injection and pinning of different magnetic domain walls (DWs) in Permalloy nanostripes with notches of different shapes. The injection is done under a constant external field by applying a 10?ns current pulse through an adjacent current line. The type of DW is identified by its anisotropic magnetoresistance (AMR). We find that, while a quasi-static pinning (nucleating at zero field and propagating the DW to the notch by slowly increasing the external field) would allow to distinguish different types of DWs pinned at the notch, a dynamic pinning (nucleating, propagating, and pinning the DW under a constant non-zero magnetic field) makes the discrimination of different DWs very difficult. Micromagnetic simulations indicate that the AMR of the different types of DWs become quite similar to each other as the injection field increases. This might explain why at large injection fields, usually only one or two values of resistance are detected, depending on the shape of the notch. Therefore, caution should be taken when establishing a one-to-one relationship between a type of DW and a value of resistance, especially if the injection is done under a non-zero external magnetic field.
International
Si
JCR
Si
Title
Journal of Applied Physics
ISBN
0021-8979
Impact factor JCR
2,21
Impact info
Datos JCR del año 2012
Volume
115
http://dx.doi.org/10.1063/1.4876302
Journal number
183909
From page
183909-1
To page
183909-6
Month
SIN MES
Ranking
Participants
  • Autor: Johanna Akerman . (UPM)
  • Autor: Manuel Muñoz Sanchez (UPM)
  • Autor: Marco Cesar Maicas Ramos (UPM)
  • Autor: Jose Luis Prieto Martin (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Electrónica Física
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