Abstract
In this article we will discuss a variety of experiments in which the magnetic decoration technique is used to image the magnetic flux line lattice in the oxide superconductors. We will first briefly describe the technique and then various studies we have undertaken over the last six years using magnetic decoration to image the flux lattices. We will describe measurements of the magnetic flux quantum, the observation of hexatic order, the order-disorder transition, vortex chains in YBCO and BSCCO, tilt-induced hexatic order in NbSe2, vortex lattices near sawtooth twins, twin boundary pinning, and thermal fluctuations of the vortices as the temperature is raised.
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