Title :
Effect of MR read non-linearities on extracted dipulse response
Author :
Torabi, Adam F. ; Marshall, Steven B.
Author_Institution :
Quantum Corp., Shrewsbury, MA, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
The effect of MR nonlinearities on the extracted dipulse method has been studied. The study shows that there is a strong relationship between MR nonlinearities arising from soft adjacent layer (SAL) thickness or MR bias current variation and measured nonlinear transition shift echo amplitude (NLTS). A formation of a new echo is observed in the extracted dipulse spectrum in the case of high MR nonlinearities
Keywords :
binary sequences; deconvolution; magnetic heads; magnetic recording noise; magnetoresistive devices; autocorrelation property; bias current variation; distortion; dynamic iterative model; extracted dipulse response; magnetoresistive head nonlinearities; nonlinear transition shift echo amplitude; pseudorandom sequence method; soft adjacent layer thickness variation; Autocorrelation; Current measurement; Data mining; Deconvolution; Magnetic heads; Magnetic recording; Magnetoresistance; Polynomials; Random sequences; Thickness measurement;
Journal_Title :
Magnetics, IEEE Transactions on
