Abstract
Transport properties of Nd2−xCexCuO4+δ/SrTiO3 single crystal films (B‖c,J‖ab) are investigated in magnetic fields B up to 9T at T=(0.4–4.2)K. An analysis of normal state (at B>Bc2) Hall coefficient RHn dependence on Ce doping takes us to a conclusion about the existence both of electron-like and hole-like contributions to transport in nominally electron-doped system. In accordance with RHn(x) analysis an anomalous sign reversal of Hall effect in mixed state at B<Bc2 may be ascribed to a flux-flow regime for two types of carriers with opposite charges.
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