Analysis of the weak coupling of the IrMn/Co/Ru/NiFe structures by ferromagnetic resonance

The Ir 20 Mn 80 /Co/Ru/ Ni 81 Fe 19 spin valve structures have been produced by sputtering deposition and analyzed by ferromagnetic resonance. Two well resolved modes are identified in the FMR spectra as the resonance of the Co and NiFe layers. The in-plane angular dependence of the resonance peaks...

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Bibliographic Details
Published in:Journal of applied physics 2011-04, Vol.109 (8), p.083917-083917-5
Main Authors: Alayo, W., Sousa, M. A., Pelegrini, F., Baggio-Saitovitch, E.
Format: Article
Language:English
Subjects:
ALLOYS
ANGULAR MOMENTUM
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
ASYMMETRY
COBALT
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
ELEMENTS
EXCHANGE INTERACTIONS
FERROMAGNETIC MATERIALS
FERROMAGNETIC RESONANCE
INTERACTIONS
INTERFACES
IRIDIUM ALLOYS
IRON ALLOYS
LAYERS
MAGNETIC MATERIALS
MAGNETIC RESONANCE
MAGNETISM
MANGANESE ALLOYS
MATERIALS
MATERIALS SCIENCE
METALS
NICKEL ALLOYS
PARTICLE PROPERTIES
PERMALLOY
PLATINUM METAL ALLOYS
PLATINUM METALS
REFRACTORY METALS
RESONANCE
RUTHENIUM
SPECTRA
SPIN
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS
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Summary:The Ir 20 Mn 80 /Co/Ru/ Ni 81 Fe 19 spin valve structures have been produced by sputtering deposition and analyzed by ferromagnetic resonance. Two well resolved modes are identified in the FMR spectra as the resonance of the Co and NiFe layers. The in-plane angular dependence of the resonance peaks for the NiFe layer present a small asymmetry, which is attributed to the interlayer exchange interaction between ferromagnetic layers across the nonmagnetic spacer. The data were analyzed considering the exchange bias at the IrMn/Co interface and the indirect coupling between Co and NiFe. The in-plane angular dependence of the resonance fields of both Co and NiFe layers present an upward (downward) shift for antiferromagnetic (ferromagnetic) coupling with respect to a system with no interlayer coupling.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3569690