High coercivity Co-Mn modified gamma -Fe/sub 2/O/sub 3/ thin films for high density recording

(Co,Mn) modified gamma -Fe/sub 2/O/sub 3/ thin films with an in-plane coercivity of 2200 to 4000 Oe, a saturation magnetization of 250 to 310 emu/cm/sup 3/, and a squareness ratio of 0.6 to 0.83 were prepared by DC-reactive magnetron sputtering. The films were deposited onto Si