Electrical transport in the superconducting and normal states in Y2Ba5Cu7Ox high-temperature superconductor

• We have studied the electrical transport properties of a recently found high temperature superconductor, Y2Ba5Cu7OxY2Ba5Cu7Ox (Y257), in the presence of magnetic field.
• Magnetoresistance of Y257 in the transient part (near the critical transition temperature) are consistent with the thermally activated flux creep model.
• Pinning energy varies inversely with the magnetic field intensity in agreement with the Yeshurun–Malozemoff model.
• The change in the slope of resistivity in the vicinity of the characteristic temperature can be ascribed to appearance of the pseudogap state.
• The Mott VRH model does not fit to the normal resistivity of these YBCO family.

The resistivity of a recently reported Y2Ba5Cu7Ox (Y257) polycrystalline, high-temperature superconductor has been characterized over temperature in the presence of magnetic field intensities in the 0–15 kOe range. The magnetoresistive behavior of Y257 has been analyzed to determine the functional dependence of the pinning energy, U  , associated with the resistive transition. Within the temperature range of 0.60