Playback performance of perpendicular magnetic recording tape media for over-50-TB cartridge by facing targets sputtering method

Perpendicular magnetic recording tape medium with laminated soft magnetic underlayers was successively formed on a 4.5 μm thin plastic film by the facing targets sputtering method at room temperature. The tape medium showed extremely high SNR values with sharp transitions in playback tests by a drum...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2012-02, Vol.324 (3), p.260-263
Main Authors: Matsunuma, S., Inoue, T., Watanabe, T., Doi, T., Mashiko, Y., Gomi, S., Hirata, K., Nakagawa, S.
Format: Article
Language:English
Subjects:
Applied sciences
Cartridges
Contact
CoPtCr–SiO 2
Density
Electronics
Exact sciences and technology
Facing targets sputtering
Magnetic and optical mass memories
Magnetic recording
Playback performance
Playbacks
Recording
Sputtered tape medium
Sputtering
Storage and reproduction of information
Thin films
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Summary:Perpendicular magnetic recording tape medium with laminated soft magnetic underlayers was successively formed on a 4.5 μm thin plastic film by the facing targets sputtering method at room temperature. The tape medium showed extremely high SNR values with sharp transitions in playback tests by a drum tester, compared to a linear format commercial tape medium. An areal density of 45.0 Gb/in. 2 of perpendicular tape medium was confirmed by a high-resolution contact tester. These results suggest that the perpendicular recording tape medium by the facing targets sputtering method is a promising candidate for a tape cartridge of over 50-TB. ► Perpendicular magnetic recording tape medium was formed by the facing targets sputtering method. ► Laminated soft magnetic underlayers reduced low-frequency media noise. ► The tape showed high SNR values with sharp transitions in playback tests by a drum tester. ► An areal density of 45.0 Gb/in. 2 was confirmed by a high-resolution contact tester.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2010.12.030