Change of GMR parameters in N-ion implanted spin-valve

D. Y. Kim, C. G. Kim, C. O. Kim, B. K. Min, J. S. Song

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Giant magnetoresistance (GMR) profiles have been measured as a function of the thickness of pinned NiFe layers for N-ion implanted spin-valve samples. The measured results are analyzed using the double-domain model (DDM), newly introducing the magnetic viscosity effect retarding the domain rotation by the defect or pinning centers. The hysteresis increase of GMR profiles after the ion implantation at θ = 90° can be explained by the magnetic viscosity effect of pinned NiFe layer. The simulation results, well fitted with the measured data, indicate that the N-ion implantation significantly raises the magnetic viscosity effect of the pinned NiFe layer. The magnetic viscosity effect after N-ion implantation exponentially decreases with the thickness of the pinned NiFe layer.

Original languageEnglish
Pages (from-to)185-188
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume239
Issue number1-3
DOIs
StatePublished - Feb 2002

Keywords

  • DDM
  • Giant magnetoresistance
  • N-ion implantation
  • Viscosity effects

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