Spatial correlation between magnetic force microscope images and recording head output

Magnetic Force Microscopy Analysis of Thermal Stability in 8 Gbit/in2 Longitudinal Recording Media

“…distance Cum) directly to a recording head read-back signal [14]. In this study, the MFM signal is the amplitude profile of the all-ones tracks averaged across the track (Fig.…”

The Equivalence of Perpendicular Magnetic Recording and Magnetic Force Microscopy

“…It has proved particularly useful in the study of written transitions in both longitudinal and perpendicular magnetic recording media [1]. Indeed, several recent works have noted strong similarities, in both time and frequency domains, between the MFM image signals of written transitions and the actual readback voltage obtained in a real recording system [2,3]. Such similarities arise simply because the MFM imaging process is a direct equivalent of the readout process in magnetic recording.…”

“…If we assume for the moment that the spacing between the tip and the sample is much greater than the sample thickness, such that the tip field gradients are effectively constant throughout the sample thickness, then (2) becomes (3) that is a correlation of the sample magnetization and the derivative of the tip field at the surface of the sample. As before, for the force-gradient type MFM we would use, in Eqs.…”

MFM study of magnetic dot patterns of different dimensions

“…This may contribute to the high resolution of the MFM tech- nique as applied to longitudinal recording [12]. It has been approved that the MFM image is directly related to the output from an inductive record head [13]. MFM also offers a more accurate picture on the nonlinear dibit interactions [14].…”