Title :
A combined transverse/polar Kerr-effect system for magnetic measurements on Co-Cr perpendicular orientation on computer discs
Author :
Mapps, D.J. ; Mahvan, N. ; Warner, S.
Author_Institution :
Plymouth Polytechnic, Plymouth, U.K.
fDate :
9/1/1987 12:00:00 AM
Abstract :
This paper describes a Kerr magneto-optic effect apparatus for measuring in-plane and perpendicular magnetic properties of Co-Cr coated computer discs. A combined differential amplifier, phase-sensitive detector technique was used to achieve a signal-to-noise ratio of 46 dB in the perpendicular system. Comparisons are made with v.s.m. measurements and results presented for 5.25" Winchester discs.
Keywords :
Magnetic measurements; Magnetooptic Kerr effect; Perpendicular magnetic recording; Aluminum; Laser beams; Magnetic analysis; Magnetic properties; Magnetic variables measurement; Magnetooptic effects; Optical films; Perpendicular magnetic recording; Phase detection; Winches;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1987.1065599
