Correspondence of Medium Noise and Recording Characteristics to M-H Loop in Perpendicular Recording Media

Abstract

Correlation of the medium noise and the recording properties to the macroscopic M-H loops were studied for perpendicular recording media. A simple analysis of medium noise based on particulate noise source was proposed. The analysis well explained experimental results, and suggested a significant role of SQ⊥ along with magnetic domain size on the noise and S/N. The M-H loop for low noise media with a high output and a high resolution was also proposed.