Recording characteristics on thin metal evaporated media in a helical-scan tape system with a spin-valve head

Metal Evaporated Media

“…Areal density of 4, 11.5, and 23 Gb/in. 2 were achieved using GMR sensors and optimized Co-CoO metal evaporated media between the years 2002 and 2007 (Motohashi et al, 2007;Ozue et al, 2002;Tetsukawa et al, 2002). These demonstrations exploited fully the possibility to tune the medium magnetic properties with the evaporation conditions and therefore to adjust the medium Mr.t product to the sensitivity of the available GMR readers.…”

“…GMR technology provides additional sensitivity compared to AMR technology. The availability of GMR sensors, thus gave the opportunity to demonstrate even higher recording densities (Kagawa et al, 1997;Motohashi et al, 2007;Ozue et al, 2002;Suzuki et al, 2004;Tetsukawa et al, 2002). Areal density of 4, 11.5, and 23 Gb/in.…”

“…The medium noise decreases with increasing the oxygen flow rate because the Co magnetic subunits decrease in size, but the signal output also decreases. A trade-off thus needs to be found for a given head sensitivity to optimize SNR (Tetsukawa et al, 2002). To achieve the areal density mark of 23 Gb/in.…”