Flux dynamics, superconducting, and normal state properties of Gd(Ba2-xPrx)Cu3O7+δ

摘要: Gd(Ba2-x Pr x )Cu3O $_{7 + \delta}$ single phase polycrystalline samples with $0.0\le x\le 1.0$ were investigated for structural, electronic and flux dynamics properties. Two-dimensional variable range hopping (VRH) is the dominant conduction mechanism in normal state of system. Pr doping strongly localizes carriers state, finally causes suppression superconductivity. The effect substitution 123 structure HTSC at R or Ba sites to increase pseudogap temperature $T_{\rm s}$ , although, has a stronger on magnetoresistance have been studied within thermally activated creep Ambegaokar Halperin slip models. derived critical current density, H c2(T), c2 (0), superconducting coherence length $\xi $ show that doping, like weak links, decreases vortex pinning energy. Our results imply understanding real superconductivity by connected crucially exact position structure.