BaFe_<12-2x>Co_xTi_xO_<19>(x=0, 0.6, 0.9)Films Synthesized by the Spray-ICP Technique

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Barium ferrite films (BaFe<SUB>12−2<I>x</I></SUB>Co<I><SUB>x</SUB></I>Ti<I><SUB>x</SUB></I>O<SUB>19</SUB>; x=0, 0.6, 0.9) were synthesized on (001)-oriented sapphire substrates by introducing atomized aqueous metal nitrate solutions into a high temperature inductively coupled plasma (ICP) generated under atmospheric pressure (the spray-ICP technique). All the films exhibited a c-axis orientation. The a-axes of the film and the substrate crossed at 30°. They were about 0.2 μm thick after 10 min of running, composed of crystallites with sizes of 300–500 nm. At x=0, the films were of single phase barium ferrite, consisting of crystallites with clear facets. Doping Co and Ti induced the formation of a small amount of (001)-oriented α-Fe<SUB>2</SUB>O<SUB>3</SUB> and degraded the crystallinity and facet of the crystallites. The films exhibited perpendicular magnetic anisotropy. Their saturation magnetizations and coercive forces almost agreed with those of films prepared by sputtering.



    MATERIALS TRANSACTIONS 37(5), 1177-1181, 1996-05 

    The Japan Institute of Metals

References:  13

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