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Magneto-Optical Imaging Studies of Flux Propagation in Ultra-Pure and Carbon-Doped$rm MgB_2$Thin Films
IEEE transactions on applied superconductivity
The mixed state in -axis oriented ultra-pure MgB 2 thin films and carbon-doped MgB 2 thin films produced by hybrid physical-chemical vapor deposition was studied using magneto-optical imaging (MOI) technique. In the ultra-pure MgB 2 films, a regular magnetic flux penetration pattern was observed, as expected from the Bean critical state model. This is in striking contrast to earlier MOI observations of MgB 2 films made by pulse laser deposition, where dentritic flux jumps were usually abundantdoi:10.1109/tasc.2005.848850 fatcat:jmftnxyb2fhxdme264ljb42bam