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
MATERIALS TRANSACTIONS 37(5), 1177-1181, 1996-05
The Japan Institute of Metals