Effect of head field gradient on transition jitter in perpendicular magnetic recording

Author

Miura, Kenji ; Muraoka, Hiroaki ; Nakamura, Yoshihisa

Author_Institution

Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1926

Lastpage

1928

Abstract

Noise of perpendicular double-layered media was investigated in connection with write head field of single pole heads. Time-domain noise measurement revealed that the noise was spatially concentrated around transitions, caused by transition jitter. The influence of writing head field was discussed based on jitter measurement using various heads; a ring head and single pole heads. The amount of transition jitter was inversely proportional to estimated writing head field gradient. The writing head field improvement, thus, contributed to reduce the medium noise

Keywords

digital magnetic recording; jitter; magnetic heads; magnetic recording noise; perpendicular magnetic recording; time-domain analysis; field gradient; head field gradient; medium noise; perpendicular double-layered media noise; perpendicular magnetic recording; ring head; single pole heads; time-domain noise measurement; transition jitter; write head field; Jitter; Magnetic field measurement; Magnetic heads; Magnetic noise; Noise measurement; Noise reduction; Perpendicular magnetic recording; Signal to noise ratio; Time domain analysis; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951010

Filename

951010