Title :
Noise characteristics of CoCrTa/NiFe perpendicular recording media
Author :
Sato, Kenji ; Wakamatsu, Hiroaki ; Shinohara, Masayoshi
Author_Institution :
Fujitsu Lab. Ltd., Atsugi, Japan
fDate :
11/1/1993 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
