Ball milling a metallic ferromagnet (Co) with an oxide antiferromagnet (NiO) produces a microstructure consisting of ferromagnetic lamellae separated by antiferromagnetic particles. Due to its large antiferromagnetic - ferromagnetic interface this microstructure induces an exchange interaction when the samples are field cooled from above the antiferromagnetic Neel temperature. This interface exchange interaction results in a substantial enhancement of the room temperature coercivity of the ferromagnetic phase.
|Journal||Materials Science Forum|
|Publication status||Published - 1 Jan 2000|