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Linear correlation between uncompensated antiferromagnetic spins and exchange bias in Mn–Ir/Co100−xFex bilayers
31
Citations
10
References
2010
Year
Magnetic PropertiesEngineeringLow-dimensional MagnetismMagnetic ResonanceSpintronic MaterialMagnetic MaterialsUncompensated Antiferromagnetic SpinsSpin PhenomenonMn–ir/co100−xfex BilayersMagnetoresistanceMagnetismEb StrengthQuantum MaterialsUc-af SpinsMaterials ScienceSpin-orbit EffectsSpin-charge-orbit ConversionPhysicsLow-dimensional SystemsAntiferromagnetismMagnetic MaterialQuantum MagnetismSpintronicsFerromagnetismNatural SciencesApplied PhysicsCondensed Matter PhysicsUc-mn SpinsMagnetic PropertyFunctional MaterialsExchange Bias
A correlation between uncompensated (UC) antiferromagnetic (AF) spins and exchange bias (EB) strength was investigated for Mn74Ir26/Co100−xFex bilayers. The EB strength had a maximum at x=25 at. %, and the x-ray magnetic circular dichroism of Mn, representing the UC-AF spins, changed systematically in sign and magnitude with respect to x. A linear correlation was found between the EB strength and the root mean square magnitude of the UC-Mn spins. The hidden parameter connecting these two quantities might be exchange coupling energy at the heterointerface, which varies as a function of the ferromagnetic layer composition.
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