Journal of Applied Physics · 2005 · 34 citations · 9 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsMaterials PhysicsThin FilmsAntiferromagnetismFerromagnetic MaterialsMagnetic AnisotropyMagnetic Properties Of SolidsMagnetic Thin FilmsThin Film Magnetic PropertiesAnisotropyAnisotropy ConstantBlocking TemperatureCritical ThicknessExchange AnisotropyThickness DependenceThickness Dependence Of AnisotropyUnidirectional Anisotropy
The dependence of exchange anisotropy of polycrystalline Mn3Ir∕Co70Fe30 bilayers on the antiferromagnetic layer thickness (dAF) was investigated. The degree of order of a Mn–Ir layer in the examined bilayers was almost constant of 0.45, regardless of dAF. The findings are stated as follows. A maximum unidirectional anisotropy constant (JK) of 1.3erg∕cm2 is obtained at dAF=10nm. The critical thickness of dAF, where JK becomes half of its maximum value, is less than 5 nm and comparable to that of the bilayer with disordered Mn–Ir. The blocking temperature (TB) is enhanced in several-ten degrees with ordering of the Mn–Ir layer.
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