Noise characteristics of CoCrTa/NiFe perpendicular recording media

Author

Sato, Kenji ; Wakamatsu, Hiroaki ; Shinohara, Masayoshi

Author_Institution

Fujitsu Lab. Ltd., Atsugi, Japan

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3730

Lastpage

3732

Abstract

The authors show that the spike-noise peak frequency is from 20 to 40 kHz at a velocity of 13 m/s. This frequency does fall wide of the frequency band of data, so it can be removed by a high pass filter. It is also shown that storage-layer noise is the greater part of the total medium noise. The low noise medium was used with a narrow pole contact recording head. A total signal-to-noise ratio of over 20 dB at a recording density of 1 Gb/in² (17 kTPI, 60 kBPI) was obtained

Keywords

chromium alloys; cobalt alloys; ferromagnetic properties of substances; iron alloys; magnetic domain walls; magnetic hysteresis; magnetic recording; magnetic thin films; nickel alloys; noise; tantalum alloys; 13 m/s; 20 to 40 kHz; CoCrTa-NiTa; CoCrTa/NiFe perpendicular recording media; domain walls; hysteresis curves; low noise medium; magnetic thin film media; spike-noise peak frequency; storage-layer noise; total medium noise; Frequency; Magnetic field measurement; Magnetic films; Magnetic heads; Magnetic noise; Magnetic recording; Noise reduction; Perpendicular magnetic recording; Saturation magnetization; Signal to noise ratio;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281284

Filename

281284