Title :
Pulse distortion in MR and GMR playback heads
Author :
Champion, Eric ; Bertram, H. Neal
Author_Institution :
Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
Distortion of the playback pulse shape due to saturation is studied via a 3-D micromagnetic model for both MR/SAL and spin-valve heads. The deviation from linearity is examined as a function of both the Mrδ of the recording medium and the off-track position of the device. Playback voltages for isolated transitions of both polarities are calculated and their shapes are compared to linear references. The differences in structure between MR and GMR sensors result in very dissimilar distortions of the playback pulse shape under large applied fields
Keywords :
giant magnetoresistance; magnetic heads; magnetoresistive devices; 3D micromagnetic model; GMR head; MR/SAL head; isolated transitions; magnetic recording; nonlinearity; playback pulse shape distortion; saturation; spin-valve head; Distortion; Extrapolation; Linearity; Magnetic heads; Magnetization; Pulse shaping methods; Shape; US Department of Commerce; Valves; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
