Analysis of AC type magnetization processes in particulate recording media

This paper presents an experimental and theoretical analysis of a number of AC-type magnetization processes similar to those encountered in magnetic r ecording (AC-biased, DC-biased, partial anhysteresis) on particulate magnet ic media. The modeling of these magnetization processes was performed with a scalar Generalized Moving Preisach (GMP) model. The experimental results obtained for a SVHS tape sample are compared with the theoretical ones. A r obust identification method for the parameters in the GMT model was used. T his method exploits the main static magnetization curves (Major Hysteresis Loop, Isothermal Remanent Magnetization, DC Demagnetization, First Magnetiz ation curve), and the integral Generalized DeltaM curve, which is sensitive to the value of the moving parameter and to the standard deviation of the interaction field distribution. The agreement between the simulated and mea sured curves is discussed.