Preparation of Nanocrystalline BaFe12 − 2x Cox Tix O19 by Ball Milling Method and their Magnetic Properties

Nanocrystalline BaFe12−2x Cox Tix O19 with 0 ≤ x ≤ 1 were prepared by a simple method of ball milling. Magnetic and SEM measurements show that the coercive field and average grain size is decreasing with the increase of Co-Ti substitution. IRM and DCD curves were measured in order to investigate the role of doping with Co-Ti on the interactions between particles in BaFe12−2x Cox Tix O19 samples using the δm technique. Interaction investigation shows that δm for all samples examined is negative, which means interparticle interactions that assists the reversal mechanisms (demagnetizing like effect).