Effect of media properties on side erase bands

Author

Lin, Kate Ching-Ju ; Thomas, Gael

Author_Institution

Dept. of Mater. Sci. & Miner. Eng., California Univ., Berkeley, CA

Volume

26

Issue

1

fYear

1990

fDate

1/1/1990 12:00:00 AM

Firstpage

132

Lastpage

134

Abstract

The erase bands on CoNiCr/Cr longitudinal media with coercivities ranging from 176 to 1390 Oe have been studied using a two-frequency, triple-track profile method. In this method, the two side tracks are recorded at 10 kfci and the central track ranges from 0 to 40 kfci. The write and the erase widths are measured by the Bitter method. Media properties such as coercivity, coercivity squareness, and remanence-thickness product are correlated with the total write width. It is shown that media with high coercivity squareness contribute to a reduction in the width of a side erase band. The magnetic structure of the triple-track profile has been characterized by high-resolution Bitter patterns using scanning electron microscopy, showing domain structures within bit cells and along track edges. The relationship of the erase band to the magnetic structure is discussed

Keywords

chromium; chromium alloys; cobalt alloys; coercive force; magnetic domains; magnetic recording; nickel alloys; remanence; scanning electron microscope examination of materials; Bitter method; CoNiCr-Cr longitudinal media; bit cells; coercivities; coercivity squareness; domain structures; erase widths; high-resolution Bitter patterns; magnetic structure; remanence-thickness product; scanning electron microscopy; side erase bands; track edges; two frequency triple-track profile method; write width; Chromium; Coercive force; Disk recording; Frequency; Magnetic domains; Magnetic heads; Magnetic properties; Magnetic recording; Materials science and technology; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.50511

Filename

50511