Experimental and theoretical studies of nonlinear transition shift in metal evaporated tape

Author

Cumpson, Stephen R. ; Stupp, Steven E.

Author_Institution

Philips Res. Lab., Eindhoven, Netherlands

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

2968

Lastpage

2970

Abstract

The results of experimental and theoretical studies of nonlinear transition shift (NLTS) in advanced metal evaporated (ME) tape are noted. Using the harmonic elimination technique the NLTS as a function of linear 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 were also calculated, and carefully fitted, 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 conjecture by J. Mallinson [1989], the NLTS is found to go through zero, For the head and medium considered, the zero occurs at an easy-axis angle of slightly greater than 35 degrees from the longitudinal direction

Keywords

demagnetisation; harmonics; magnetic heads; magnetic tapes; calibrated self-consistent recording model; easy-axis angle; harmonic elimination technique; linear recording density; magnetic head; metal evaporated tape; nonlinear transition shift; partial erasure; Automatic testing; Demagnetization; Density measurement; Displays; Laboratories; Magnetic field measurement; Magnetic heads; Magnetic hysteresis; Predictive models; Wavelength measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617813

Filename

617813