Generalized /spl delta/m curves for particulate recording media obtained by Fourier analysis

The generalized /spl delta/m/sub a/ curve obtained by the Fourier analysis of the first magnetization and major hysteresis loop is analyzed within the frame of a generalized moving Preisach model. Analytical expressions of the Fourier coefficients are obtained when the mean field interactions are negligible. Experimental and simulated /spl delta/m and /spl delta/m/sub a/ curves are obtained for commercial particulate recording tapes. The condition is established for using the generalized curves instead of the classical ones in particulate media.