Studies of Ceramic Superconductors: Flux Flow and Chemical Doping
Yi-Han Kao Principal Investigator
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This proposal aims to study two important problems in ceramic high Tc superconductor (HTCS). They are the dynamics of flux flow and effects of chemical doping. Two major techniques will be used to study both problems together in a systematic way. These techniques are the direct flux-motion monitoring (DFMM) technique and the x-ray absorption fine structure (XAFS) technique. by a combination of these two techniques, the results are expected to provide information on flux dynamics and microstructures which will be useful for a clear understanding and effective control of the magnetic properties as well as critical current density of the high transition temperature superconductors. %%% This experimental study aims to connect the phenomena of flux flow/flux pinning with their microscopic causes, namely, the impurities. Both the direct flux-motion monitoring (DFMM) technique and the x-ray absorption fine structure (XAFS) technique will be used in combination for this study. It will provide a clear understanding and effective control the magnetic properties and critical current density of the ceramic high transition temperature superconductors.