Abstract
Recent low temperature magnetic force microscope measurements on YBa 2Cu 3O 7− δ thin films are summarized. The high spatial resolution and the high sensitivity of the low temperature magnetic force microscope make it well suited for probing the local state of a magnetic sample. Single vortices have been imaged and their pinning locations determined. In addition, the tip can be used to locally perturb the magnetic state of the sample to move vortices out of their pinning centers or create vortex bundles.
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