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 language | English |
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Pages (from-to) | 185-188 |
Number of pages | 4 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 239 |
Issue number | 1-3 |
DOIs | |
State | Published - Feb 2002 |
Keywords
- DDM
- Giant magnetoresistance
- N-ion implantation
- Viscosity effects