FePt(001)エピタキシャル垂直磁化膜の作製と磁気特性 (<特集>薄膜)

概要

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Epitaxial FePt(001) thin films were prepared on MgO(100) substrates by RF-magnetron sputtering. Magnetization measurements revealed that all the samples were more easily magnetized by a field applied perpendicular to the film plane than by one applied parallel to it. The squareness M_r/M_s improved with decreasing FePt layer thickness d_<FePt> this is considered to be due to a change in the magnetic domain structure. Pt buffer layers were also found to be effective for improving the magnetic properties. The maximum energy product (B・H)_<max> of a sample with d_<pt>= 1000A grown on a polished substrate had a maximum value of 30MG・Oe This effect of the Pt buffer layer on the magnetic propertied is sensitive to the surface condition of the substrate.
社団法人日本磁気学会の論文
1997-04-15