A mixture of TiO2 and Co is placed in a vacuum chamber under selected
oxygen pressure and irradiated in the vacuum chamber with a selected laser light
to cause TiO2 and Co to evaporate from the target and a layer of TiO2-Co
to epitaxially grow on a heated single crystal substrate. The titanium dioxide-cobalt
magnetic film for use in a photocatalyst, a semiconductor material having optical,
electrical and magnetic functions, and a transparent magnet. The film is expressed
by Ti1-xCoxO2 where 0
