The annealing effects on the exchange bias properties in antiferromagnetic Heusler alloy Ni 2 MnAl/Fe bilayers were investigated. Exchange bias shifts were observed at low temperatures. The sign reversal of the exchange bias shift was observed below the blocking temperature probably due to the training effect. The exchange bias shift showed a peak for the annealing temperature dependence, on the other hand, the blocking temperature increased with the annealing temperature, which closely correlates with the crystallographic grain size of the antiferromagnetic Ni 2 MnAl layer.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics