Recording Characteristics of Obliquely Evaporated Thin Co-O Films

Abstract

The dependence of the magnetic properties, crystallographic structure, morphological structure and recording characteristics on the angle of incidence were studied on the obliquely evaporated thin Co-O films. The preferred c-axis orientation angle of Co in Co-O films is almost equal to the minimum incident angle( e min), because the growth at the initial deposition stage around the maximum incident angle( emax) is very thin and has little magnetization due to oxidization. The Co-O film deposited at emin of 40· exhibits a maximum output at a recording density of 100kFCI, which is higher by 5dB than that of ME tape for a high-band 8mm VCR.

Reactively evaporated Co thin film for tape media

“…7 for this film indicated that the extrinsic easy axis of this film is tilted out of the medium plane by 15" and has an anisotropy constant of 3.5 x 106 ergkc. X-ray diffraction data in Ogawa's [3] results, Auger spectroscopy of the film, Fig. 9, revealed 30at% oxygen distributed Uniformly through the film.…”