High-resolution scanning Hall probe microscopy

A high resolution scanning Hall probe microscope is used to spatially resolve vortices in high temperature superconducting Bi₂Sr₂CaCu₂O_8+(delta) crystals. We observe a partially ordered vortex lattice at several different applied magnetic fields and temperatures. At higher temperatures, a limited amount of vortex re-arrangement is observed, but most vortices remain fixed for periods long compared to...