Title :
Photothermally modulated readback from a magnetic tape
Author :
Kaack, M. ; Pelzl, J. ; Orth, Th.
Author_Institution :
Inst. fur Experimentalphys. III, Ruhr-Univ., Bochum, Germany
fDate :
11/1/1995 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
