ACTA

Influence of the Granularity on the Transversal Resistance in Y_0.55Pr_0.45Ba₂Cu₃O_{7 - δ} Superconductor

M.S. da Luz^{a, b}, C.A.M. dos Santos^b and A.J.S. Machado^b
^aInstituto de Ciências Tecnológicas e Exatas, Universidade Federal do Triângulo Mineiro, Uberaba, Brazil
^bDepartamento de Engenharia de Materiais, Escola de Engenharia de Lorena-USP, Brazil

Received: October 18, 2010; In final form: August 29, 2012

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This work reports longitudinal (R_XX) and transverse (R_XY) resistance as a function of temperature measured at low magnetic fields for Y_0.55Pr_0.45Ba₂Cu₃O_{7 - δ} polycrystalline sample. It is observed non-zero transverse resistance at zero applied magnetic field below superconducting transition. The comparison between R_XX (T) and R_XY (T) curves demonstrate unambiguously that the transverse resistance is related to the double resistive superconducting transition in granular superconductors. I-V curves indicate that the transport properties of the investigated sample are in agreement with the predictions of the two-fluid model.

DOI: 10.12693/APhysPolA.124.702
PACS numbers: 74.25.-q, 74.25.Fy, 74.81.Bd