Geometric and Magnetic Properties of L10 FePtRh Ferro-antiferromagnetic Pattern Fabricated by Flat-patterning Method using Atomic Diffusion

Abstract

A flat-patterning method that exploits ferromagnetic (FM)-antiferromagnetic (AF) transition in[001]-oriented L10 FePt1-xRhx films was investigated. FM-AF patterns with several dot diameters (D) were fabricated by locally diffusing a small percentage of FePt atoms onto the FePt1-xRhx 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.