原子拡散を利用したフラット?パターニング法による[001] L1₀-FePtRh強磁性-反強磁性パターンの作製

摘要

??A flat-patterning method that exploits ferromagnetic (FM)-antiferromagnetic (AF) transition in [001]-oriented L 1_(0) FePt_(1-x)Rh_(x) films was investigated. FM-AF patterns with several dot diameters (D ) were fabricated by locally diffusing a small percentage of FePt atoms onto the FePt_(1-x)Rh_(x) film. The geometric and magnetic properties of the patterns were analyzed in detail. Only areas whose composition crossed the FM-AF threshold underwent a magnetic phase change to the FM phase. FM dots with single-domain structures were observed by magnetic force microscopy in the AF matrix in a range of D ≤ 100 nm.