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The possibility of realizing linear magnetic recording systems over 15 Gb/in² recording density has been shown in our test with newly developed metal particulate (MP) tape using 35-nm-size fine metal particles and a GMR head designed for hard disk drive (HDD). It was done under a read-track-base calculation with the following media: magnetic layer thickness = 60 nm, surface roughness Ra = 2.0 nm. [ABSTRACT FROM AUTHOR]

New metal particle (MP) media was developed for use with giant magnetoresistive (GMR) heads. We confirmed the capability of constructing a helical scan magnetic recording system exceeding 3 Gb/in² recording density, because of sufficient signal-to-noise ratio (SNR) under test conditions at 6.74 Gb/in² of read-track-base calculations with the media (magnetic layer thickness = 50 nm, magnetic particle size = 45 nm, and surface roughness Ra = 1.8 nm). Low media partial-abrasive properties are incorporated to avoid excessive head gap material wear. [ABSTRACT FROM AUTHOR]