Domain studies in single-crystal ferrite MIG heads with image-enhanced, wide-field, Kerr microscopy

Author

Schäfer, Rudolf ; Argyle, Bernell E. ; Trouilloud, Philip L.

Author_Institution

IBM Thomas Watson Res. Center, Yorktown Heights, NY, USA

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2644

Lastpage

2646

Abstract

The magnetic domain structure at the media-facing surfaces of the single-crystal ferrite MIG heads is investigated using the magnetooptical Kerr effect. Domain behavior depends strongly on the stress state and surface treatment of the head. The pole tips display coercive zig-zag domain walls, which are nucleated at the gap by write current pulses. For the samples studied, nucleation and motion of these walls are different between heads which exhibit small secondary pulses in the read-back signal and heads which do not

Keywords

Kerr magneto-optical effect; ferrite devices; magnetic domain walls; magnetic domains; magnetic heads; surface treatment; Mn_1-xZn_xFe₂O₄; coercive zig-zag domain walls; image enhanced wide field Kerr microscopy; magnetic domain structure; magnetooptical Kerr effect; media-facing surfaces; nucleation; pole tips; read back signal secondary pulses; single-crystal ferrite MIG heads; stress state; surface treatment; wall motion; write current pulses; Chemical lasers; Ferrites; Kerr effect; Magnetic domains; Magnetic force microscopy; Magnetic heads; Magnetooptic effects; Magnetooptic recording; Soft magnetic materials; Surface treatment;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179583

Filename

179583