Magnetic recording medium comprising a nickel aluminum or iron aluminum underlayer and chromium containing intermediate layer each having (200) dominant crystalographic orientation

摘要

PCT No. PCT/US97/02169 Sec. 371 Date Oct. 17, 1997 Sec. 102(e) Date Oct. 17, 1997 PCT Filed Feb. 26, 1997 PCT Pub. No. WO98/16923 PCT Pub. Date Apr. 23, 1998A magnetic recording medium is formed by depositing a Cr-containing sub-underlayer on a surface oxidized seed layer, such as NiP, with direct current (DC) magnetron sputtering, depositing a NiAl or FeAl underlayer on the sub-underlayer, and depositing a Cr-containing intermediate layer on the NiAl or FeAl underlayer. The medium features high coercivity, low noise, and (200)-dominant underlayer crystallographic orientation, even with sub-underlayer deposition at temperatures as low as about 25 DEG C. The medium is suitable for high density longitudinal magnetic recording.