DocumentCode :
1000939
Title :
A new W-shaped single-pole head and a high density flexible disk perpendicular magnetic recording system
Author :
Hokkyo, Jiro ; Hayakawa, Kiyonori ; Saito, Ichiro ; Shirane, Kyoichi
Author_Institution :
Sony Corporation, Research Center, Yokohama, Japan
Volume :
20
Issue :
1
fYear :
1984
fDate :
1/1/1984 12:00:00 AM
Firstpage :
72
Lastpage :
74
Abstract :
A new single-pole head with no auxiliary pole was developed for perpendicular magnetic recording. The head is called WSP head (W-shaped Single Pole head) because the head has a W-shaped side core which contributes to increase the recording and reproducing sensitivitiy. The head field of the new head has the same distribusion as that of an auxiliary pole head[1]. The recording and reproducing sensitivity of the head is equal to or higher than that of a ring-type video head. The head eliminates mechanical problems which prevent its application in perpendicular magnetic recording because we can locate the head on one side of the recording medium. As a possible application of the WSP head, a 3 1/2-inch flexible disk recording system was constructed. A linear recording density of the flexible disk system was 65.5 kbits/inch. This density is equivalent to 8 times that of the existing high-density 3 1/2-inch micro-floppy and 11 times that of a 5 1/4-inch floppy disk. In termes of information storage, this density gives a 4 megabyte unformated capacity on one side of a 3 1/2-inch flexible disk. The overwrite signal-to-noise ratio was greater than 30 dB and the peakshift displacement was less than 10 % at the linear dinsity of 65.5 kbits/inch.
Keywords :
Magnetic disk recording; Magnetic recording/reading heads; Disk recording; Floppy disks; Magnetic cores; Magnetic fields; Magnetic flux; Magnetic flux density; Magnetic heads; Perpendicular magnetic recording; Video recording; Voltage;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1984.1062999
Filename :
1062999
Link To Document :
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