In situ ultra-high resolution magnetic imaging

A method of ultra-high resolution magnetic imaging in situ to the drive has been developed. Enhanced magnetization images are produced through deconvolution of the linearized readback by a synthesized two-dimensional head response kernel. The technique first linearizes the measured output by removing the nonlinear GMR head transfer curve. In situ deconvolved images are correlated with conventional MFM (scanning probe-tip) images. After deconvolution, one can readily obtain two-dimensional images with sub-30 nm resolution.