Generalized δm curves for particulate recording media obtained by Fourier analysis

The generalized δm_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 δm and δm_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.