Direct observation of the flux-line vortex glass phase in a type II superconductor
Abstract
The order of the vortex state in La1.9 Sr0.1 CuO4 is probed using muon spin rotation and small-angle neutron scattering. A transition from a Bragg glass to a vortex glass is observed, where the latter is composed of disordered vortex lines. In the vicinity of the transition the microscopic behavior reflects a delicate interplay of thermally-induced and pinning-induced disorder.
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