Estimating the magnetic penetration depth using constant-height magnetic force microscopy images of vortices

Details Estimating the magnetic penetration depth using constant-height magnetic force microscopy images of vortices Estimating the magnetic penetration depth using constant-height magnetic force microscopy images of vortices

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001njph....3...24r&link_type=abstract

New Journal of Physics, Volume 3, Issue 1, pp. 24 (2001).

Physics

8

Scientific paper

We present constant-height magnetic force microscopy images of magnetic vortices on a superconducting Nb film. From a comparison of the measured vortex profiles with theoretical models, as a function of scan height, we conclude that it is possible to determine the relative value of the magnetic penetration depth λ to within 10-20% using an uncalibrated tip. If a quantitatively characterized tip with a known magnetization structure were used, this would then permit one to obtain an absolute value of λ with similar accuracy.

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