MICROMAGNETIC STUDIES OF CO-PT-CR LONGITUDINAL RECORDING MEDIA

The micromagnetic structures of recorded tracks in two types of isotro pic CoPtCr longitudinal recording media have been investigated using t he modified differential phase contrast method of Lorentz electron mic roscopy. Media intended for both inductive and magnetoresistive playba ck have been studied and thin film specimens suitable for electron mic roscopy were isolated from standard NiP plated AlMg hard disks. The ul timate aim is to map the magnetization distribution associated with th e writing process and to attempt to correlate this with the physical m icrostructure of the films.