Perpendicular Anisotropy Master Medium in Magnetic Printing for Writing High-Density Servo Signal

A perpendicular anisotropy master medium (PAMM) has been proposed for magnetic printing, and it is expected to improve the printing characteristics of the servo signal. In this study, we experimentally performed magnetic printing by using the PAMM, which is composed of CoPt magnetic film, with perpe...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2009-10, Vol.45 (10), p.3676-3678
Main Authors: Sheeda, N., Nakazawa, M., Konishi, H., Komine, T., Sugita, R.
Format: Article
Language:English
Subjects:
Anisotropic magnetoresistance
Anisotropy
Cobalt compounds
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Magnetic anisotropy
Magnetic films
Magnetic hysteresis
Magnetic printing
Magnetism
Master-slave
Materials science
Optimization
Other topics in materials science
perpendicular anisotropic master
Perpendicular magnetic recording
Physics
Printing
Saturation (magnetic)
Saturation magnetization
servo signal
Servomechanisms
Soft magnetic materials
Writing
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Summary:A perpendicular anisotropy master medium (PAMM) has been proposed for magnetic printing, and it is expected to improve the printing characteristics of the servo signal. In this study, we experimentally performed magnetic printing by using the PAMM, which is composed of CoPt magnetic film, with perpendicular magnetic anisotropy and large saturation magnetization. It is clarified that the optimum printing field for PAMM is 3.5 kOe, which is 0.5 kOe lower than that of conventional master medium, and that the output signal from the slave medium printed by PAMM is about twice larger than that of the conventional master medium. Furthermore, the printing characteristics for PAMM can be further improved with thicker magnetic film.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2009.2022950