EXPERIMENTAL AND THEORETICAL-STUDIES OF NONLINEAR TRANSITION SHIFT INMETAL EVAPORATED TAPE

The results of experimental and theoretical studies of nonlinear trans ition shift (NUTS) in advanced metal evaporated (ME) tape are noted. U sing the harmonic elimination technique the NLTS as a function of line ar recording density was measured, Using a calibrated self-consistent recording model the patterns corresponding to the harmonic elimination technique were simulated allowing NLTS to be calculated. Dipulses wer e also calculated, and carefully fit, allowing Partial Erasure (PE) to be determined, The variation in NLTS as a function of easy-axis angle in ME tape was also simulated. In agreement with a previous conjectur e by J. Mallinson, the NLTS is found to go through zero. For the head and medium considered, the zero occurs at an easy-axis angle of slight ly greater than 35 degrees from the longitudinal direction.