Journal of Applied Physics · 1991 · 30 citations · 7 references
Natural SciencesMaterials SciencePhysicsMagnetic MaterialsMaterials PhysicsThin FilmsFerromagnetic MaterialsFerromagnetismMagnetic AnisotropyMagnetic Thin FilmsSurface MagnetismThin Film Magnetic PropertiesAnisotropyAnisotropy In MultilayersAnisotropy In Thin FilmsMagnetic PropertiesMagnetization In Thin FilmsMultilayer Magnetic FilmsPerpendicular Magnetic AnisotropyTemperature Dependence Of Anisotropy
Perpendicular magnetic anisotropy (K⊥) and related magnetic properties in Pt/Fe multilayers [compositionally modulated multilayer films (CMFs)] are investigated. It is found that Pt/Fe CMFs with about an 18-Å Pt layer and Fe layer below 5 Å become perpendicularly magnetized films. Surface magnetic anisotropy (Ks) and volume anisotropy (Kv) are 0.46 erg/cm2 and about − 2 × 107 erg/cm3 at room temperature, respectively. The Ks is almost equivalent to that of Pt/Co CMFs and increases with decreasing temperature. The absolute value of Kv, however, is much larger than that of the Pt/Co system. The effective magnetic anisotropy (K⊥ eff) of [Fe(4.7 Å)/Pt(18.5 Å)]80 CMF changes from positive to negative at T≂200 K with decreasing temperature.
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