Exploratory Experiments in Recording on Sputtered Magnetic Tape at an Areal Density of 148 Gb/in $^{text\\bf 2}$

Author

Tachibana, J. ; Endo, T. ; Hiratsuka, R. ; Inoue, S. ; Berman, D. ; Jubert, P.-O. ; Topuria, T. ; Poon, C. ; Imaino, W.

Author_Institution

Sony Corp., Tagajo̅, Japan

Volume

50

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

1

Lastpage

6

Abstract

A sputter deposited CoPtCr-SiO₂ perpendicular recording media with excellent orientation was successfully grown on a thin polyamide film. Using 32-channel GMR tape heads and advanced hard-disk drive heads, the recording performance and durability of this media was investigated. These studies demonstrated an unprecedented broadband signal-to-noise ratio of 17 dB at 896 kb/in using a 77 nm-wide TMR reader, corresponding to an estimated 148 Gb/in² recording density, and provided a preliminary assessment of durability exceeding current tape media specifications.

Keywords

chromium alloys; cobalt alloys; disc drives; giant magnetoresistance; hard discs; magnetic heads; magnetic recording; platinum alloys; polymer films; silicon compounds; sputter deposition; tape recorders; thin film devices; tunnelling magnetoresistance; 32-channel GMR tape; CoPtCr-SiO₂; TMR reader; advanced hard-disk drive head; areal density; noise figure 17 dB; size 77 nm; sputter deposited perpendicular magnetic tape recording media; thin polyamide film; Magnetic hysteresis; Magnetic resonance imaging; Media; Perpendicular magnetic recording; Signal to noise ratio; Substrates; Magnetic tape media; magnetic tape recording; sputter deposited media;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2319197

Filename

6971770