Improvement of magnetic and R/W performance by annealing on Co-Pt-TiO_2 granular films for perpendicular magnetic recording media

Abstract

Annealing effects on magnetic, crystallographic and recording performance for Co-Pt-TiO_2 perpendicular recording media are investigated. Proper annealing temperature and duration improve medium characteristics such as crystal orientation, steep magnetization loop with △H_C/H_C reduction and SNR enhancement of the media and so on. It is revealed that these improvements come from medium uniformity in microstructure by annealing.