Research Papers in Physics and Astronomy

 

Date of this Version

January 1997

Comments

Published by American Institute of Physics. Appl. Phys. Lett., 70, 135(1997). © 1997 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

We have used superparamagnetic magnetic force microscopy (MFM) tips to obtain high spatial resolution MFM images of recording heads. Profiles of the magnetic field gradient above a thin-film recording head under 3 mA bias current to the head and various tip-head distance conditions are presented. At a low tip-head distance, the gap width, gap location, and gap-field structure can be well resolved in these MFM images. Superparamagnetic tips show promise for the magnetic imaging of recording heads with gap widths below 200 nm.

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