Preparation of Nanocrystalline 12 2 19 BaFe Co Ti O xxx − by Ball Milling Method and their Magnetic Properties

Abstract

Nanocrystalline  BaFe_12-2xCo_xTi_xO₁₉ 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 BaFe_12-2xCo_xTi_xO₁₉ samples using δm the  technique. Interaction investigation shows that δm for all samples examined is negative, which means interparticle interactions that assists the reversal mechanisms (demagnetizing like effect).

Keywords: Ball milling, Barium ferrite, Coercive field, Magnetization.