Title :
An analysis of magnetization processes in metal evaporated tape
Author :
Richter, Hans Jürgen
Author_Institution :
BASF AG, Ludwigshafen, Germany
fDate :
1/1/1993 12:00:00 AM
Abstract :
It is shown that conventional hysteresis data completely mask the true magnetic properties of metal evaporated (ME) tape. For a true demagnetization correction a continuous adjustment of the external field and its angle during measurement has to be accomplished. Using vector magnetometry, an iterative method for the determination of the static hysteresis compensated for film demagnetization of obliquely oriented thin-film recording media was developed. It is shown that the ME tape resembles a particulate medium which is highly oriented and has an extremely narrow switching field distribution. The magnetization reversal process is incoherent with a strong increase of switching fields at high angles between the field and the intrinsic easy axis which is located at an angle of 38° to the film plane. It is shown that thermal activation has a strong effect on the measured data
Keywords :
demagnetisation; magnetic hysteresis; magnetic tapes; magnetic thin films; magnetic variables measurement; magnetisation reversal; demagnetization correction; iterative method; magnetic properties; magnetization processes; magnetization reversal; metal evaporated tape; obliquely oriented thin-film recording media; particulate medium; static hysteresis; switching fields; thermal activation; vector magnetometry; Demagnetization; Goniometers; Iterative methods; Magnetic analysis; Magnetic field measurement; Magnetic films; Magnetic hysteresis; Magnetic properties; Magnetization processes; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
