Photothermally modulated readback from a magnetic tape

Author

Kaack, M. ; Pelzl, J. ; Orth, Th.

Author_Institution

Inst. fur Experimentalphys. III, Ruhr-Univ., Bochum, Germany

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3123

Lastpage

3125

Abstract

The photothermally modulated (PM) readback technique is based on the thermal modulation of a recorded magnetic pattern. The PM-readback signal that is detected by a conventional tape recorder head comprises lateral and depth resolved information of the recorded signal. The PM-readback has been studied from homogeneously magnetized tapes and from a sinusoidal track recorded on a CrO₂ tape. From the signals measured as a function of laser spot position and of modulation frequency the depth and lateral variation of the magnetization has been determined

Keywords

magnetic recording; magnetic tapes; magnetisation; photothermal effects; CrO₂; depth resolved information; homogeneously magnetized tapes; laser spot position; lateral information; magnetic tape; modulation frequency; photothermally modulated readback; recorded magnetic pattern; sinusoidal track; thermal modulation; Coils; Frequency modulation; Intensity modulation; Magnetic flux; Magnetic heads; Magnetic modulators; Magnetic resonance; Magnetization; Magnetostatic waves; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.490302

Filename

490302