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Magnetoresistance of Superconducting Granules and Grain Boundaries in Ceramic YBa2Cu3O7−δ High-Temperature Superconductors in Weak Magnetic Fields

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Abstract

The objective of the work is to establish the contribution of superconductive granules and grain boundaries (weak links) in magnetoresistance ρ value of YBa2Cu3O7−δ granular high-temperature superconductor (HTS) at T<T c. The current-voltage characteristics (CVCs) \(E(j)_{H_{\mathrm{ext}} = \mathrm{const}}\) of YBa2Cu3O6.95 ceramic samples were measured in H ext (0≤H ext≤≈500 Oe) magnetic fields. The CVCs \(E(j)_{H_{\mathrm{trap}} = \mathrm{const}}\) of the samples magnetized in H treat magnetic fields were measured at H ext=0. Based on the CVCs, \(\rho(j)_{H_{\mathrm{ext}} = \mathrm{const}}\), ρ(H ext) j=const and \(\rho(j)_{H_{\mathrm{treat}} = \mathrm{const}}\) dependences were reestablished. The comparative analysis of \(\rho(j)_{H_{\mathrm{ext}} = \mathrm{const}}\) and ρ(H ext) j=const dependences indicates the magnetic field redistribution between grain boundaries and superconductive granules influence on transport and galvanomagnetic properties of granular HTS. The superconductive grain magnetoresistance ρ g was established to be significantly lower than ρ J value of Josephson medium.

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References

  1. Ji, L., Rzchowski, M.S., Anand, N., Tinkham, M.: Magnetic-field dependent surface resistivity and two-level model of granular superconductors. Phys. Rev. B 47, 470 (1993)

    Article  ADS  Google Scholar 

  2. Kiliç, A., Kiliç, K., Yetiş, H., Çetin, O.: Low-field magnetovoltage measurements in superconducting YBa2Cu3O7−δ . New J. Phys. 7, 212 (2005)

    Article  ADS  Google Scholar 

  3. Burlachkov, L., Mogilko, E., Schlesinger, Y., Strelniker, Y.M., Havlin, S.: Resistive transition anisotropy in superconducting granular ceramics. Phys. Rev. B 67, 104599 (2003)

    Article  ADS  Google Scholar 

  4. dos Santos, C.A.M., da Luz, M.S., Ferreira, B., Machado, A.J.S.: On the transport properties in granular or weakly coupled superconductors. Physica C 391, 345 (2003)

    Article  ADS  Google Scholar 

  5. Balaev, D.A., Popkov, S.I., Sabitova, E.I., Semenov, S.V., Shakhudinov, K.A., Shabanov, A.V., Petrov, M.I.: Compression of a magnetic flux in the intergrain medium of YBa2Cu3O7 granular superconductor from magnetic and magnetoresistive measurements. J. Appl. Phys. 110, 093918 (2011)

    Article  ADS  Google Scholar 

  6. Daghero, D., Masoero, A., Mazzetti, P., Stepanescu, A.: Anisotropy of the electrical resistance of high-T c superconductors under magnetic field. Physica C 341–348, 1869 (2000)

    Article  Google Scholar 

  7. Sukhareva, T.V., Finkel, V.A.: Phase transition in vortex structure of granular YBa2Cu3O7−δ HTS in weak magnetic field. J. Exp. Theor. Phys. 107(5), 787 (2008)

    Article  ADS  Google Scholar 

  8. Gerashchenko, O.V.: Voltage fluctuations in granular superconductors in perpendicular configuration. Supercond. Sci. Technol. 16, 690 (2003)

    Article  ADS  Google Scholar 

  9. Derevyanko, V.V., Sukhareva, T.V., Finkel, V.A.: Effect of an external magnetic field and trapped magnetic flux on the CVCs of a granular HTS YBa2Cu3O7−δ . Phys. Solid State 48(8), 1455 (2006)

    Article  ADS  Google Scholar 

  10. Sukhareva, T.V., Finkel, V.A.: Magnetoresistance of superconducting grains in ceramic YBa2Cu3O7−δ HTS in weak magnetic fields. Phys. Solid State 53(5), 914 (2011)

    Article  ADS  Google Scholar 

  11. Kunchur, M.N., Askew, T.R.: Hysteretic internal field and critical currents in polycrystalline superconductors. J. Appl. Phys. 84, 6753 (1998)

    Article  ADS  Google Scholar 

  12. Finkel, V.A., Arzhavitin, V.M., Blinkin, A.A., Derevyanko, V.V., Razdovskii, Yu.Yu.: The influence of weakly bonded oxygen on the crystal structure, electrical and relaxation properties of HTS YBa2Cu3O7−δ ceramics. Physica C 235–240, 303 (1994)

    Article  Google Scholar 

  13. Finkel, V.A., Derevyanko, V.V.: Lower critical field of the textured HTS. Low Temp. Phys. 26(2), 92 (2000)

    Article  ADS  Google Scholar 

  14. Meilikhov, E.Z.: Structural features, critical currents and CVCs of HTS ceramics. Phys. Usp. 36(3), 129 (1993)

    Article  ADS  Google Scholar 

  15. Cai, Z.X., Welch, D.O.: Simulation study of the critical currents of YBa2Cu3O7−δ ceramics. Phys. Rev. B 45, 2385 (1992)

    Article  ADS  Google Scholar 

  16. González, M.T., Currás, S.R., Maza, J., Vidal, F.: Voltage asymmetry in CVCs of granular YBa2Cu3O7−δ at very low magnetic fields. Phys. Rev. B 63, 22511 (2001)

    Google Scholar 

  17. dos Santos, C.A.M., Oliveira, C.J.V., da Luz, M.S., Bortolozo, A.D., Sandim, M.J.R., Machado, A.J.S.: Two-fluid model of granular superconductors. Phys. Rev. B 74, 184526 (2006)

    Article  ADS  Google Scholar 

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Acknowledgements

The work was carried out under support of the Science and Technology Center in Ukraine (STCU Project # P424).

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  1. National Science Center “Kharkov Institute of Physics and Technology”, ul. Akademicheskaya 1, Kharkov, 61108, Ukraine

    Tatyana V. Sukhareva

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  1. Tatyana V. Sukhareva
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Correspondence to Tatyana V. Sukhareva.

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Sukhareva, T.V. Magnetoresistance of Superconducting Granules and Grain Boundaries in Ceramic YBa2Cu3O7−δ High-Temperature Superconductors in Weak Magnetic Fields. J Supercond Nov Magn 26, 2021–2025 (2013). https://doi.org/10.1007/s10948-012-1993-3

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