Torque approach for tuning exchange bias training effect in polycrystalline NiFe/FeMn bilayers
Résumé
In order to tune the exchange bias training effect, a torque approach is proposed. Torque loops are performed between two consecutive hysteresis loops by clockwise and counterclockwise rotation of the sample within an angular range under an in-plane external magnetic field. For the angular range from 0° to 180°, the coercivity H C and the exchange field H E are both reduced and the pinning direction PD orientation is changed, exhibiting the first type training effect. For the angular range from 20° to 380°, H C and the PD orientation are almost unchanged although H E is reduced, exhibiting the second type training effect.
Origine | Fichiers éditeurs autorisés sur une archive ouverte |
---|
Loading...