Texture and self-biased property of an oriented M-type barium ferrite thick film by tape casting

In this paper,the oriented M-type barium ferrite(BaM) thick films with different thicknesses are prepared by tape casting.It is found that the crystallographic alignment degree(f),the pore and the squareness ratio(Mr/Ms) are not affected by the thickness of the film.XRD and SEM results show that the thick film has hexagonal morphology with a crystal texture of c-axis grains perpendicular to film plane.The hysteresis curve indicates that the BaM thick film exhibits a self-biased property with a remanent magnetization of 3.30 T,a squareness ratio(Mr/Ms) of 0.81,and a coercivity of 0.40 T.The results show that the BaM thick film has potential for use in self-biasing microwave devices,and also proves that the tape casting technique is capable of fabricating high-quality barium ferrite films,thus providing a unique opportunity to realize the large area production of thick film.