Title :
Calculation method of GMR head response for double layered perpendicular medium
Author :
Suzuki, Yoshio ; Nishida, Yasutaka
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
A new field calculation method was developed for the reading process that involves a double-layered medium with a soft underlayer. The image fields due to both the underlayer and the ABS have to be taken into consideration. It was found that the field can be expressed in an equation similar to that describing multiple reflection of light in an optical multilayer, except that the scalar terms in the optical system have to be replaced with tensor terms with Fourier components as bases. This field, in turn, may be used as an input to a micromagnetic simulation model for GMR head to give the reproduced signal
Keywords :
Fourier analysis; giant magnetoresistance; magnetic heads; magnetoresistive devices; perpendicular magnetic recording; ABS; Fourier tensor; double layered perpendicular magnetic recording medium; giant magnetoresistive head; image field; micromagnetic simulation model; multiple reflections; reading process; soft underlayer; Equations; Magnetic heads; Magnetic recording; Micromagnetics; Optical devices; Optical recording; Optical reflection; Optical superlattices; Perpendicular magnetic recording; Tensile stress;
Journal_Title :
Magnetics, IEEE Transactions on
