Microscopic investigations of overwritten data

摘要: The magnetic field distributions of overwritten patterns on rigid thin film disk media have been imaged with submicron resolution by using the force scanning tunneling microscope. capability device to measure fields locally is exploited quantitatively understand conditions under which portions data can remain and be detectable. persistence retrievability previously recorded are related radial offset head during overwrite for created at high low recording densities. It observed that densities, offsets less than 2 μm, transitions affect newly written inducing track width modulation along its edges. At variations noticeable, but elucidated examining detailed geometrical structure patterns.