Magnetic field imaging by using magnetic force scanning tunneling microscopy

Magnetic fields on previously recorded magnetic disk are measured and analyzed using a modified scanning tunneling microscope. The technique employs the interaction of local magnetic field with a flexible thin-film magnetic probe. The dependence of resolution and image contrast on spatial orientation of the probe with respect to the sample is theoretically investigated. The predictions of this model, in limiting cases, are supported and illustrated by experimental results. A method for a controlled batch fabrication of probe tips is also discussed.