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Magnetoresistivity and Hall Effect in Mixed and Normal States of Electron-Doped Superconductor Nd2-XCexCuO4+δ with Nonstoichiometric Disorder

Magnetoresistivity and Hall effect measured in magnetic fields up to B=9T (B ║ c, J ║ ab) in electron-doped Nd2−xCexCuO4+δ single crystal films with x = 0.15 and different oxygen content (δ) were studied in a temperature range of 0.4-4.2 K. The resistivity and Hall coefficient behaviors in the mixed state are discussed in the framework of flux-flow model with the inclusion of the back-flow of vortices owing to the pinning forces.