Abstract
We grew high-quality epitaxial YBa2Cu3O7 (YBCO) superconducting thin films by the trifluoroacetate route on top of chemical solution deposited SrTiO3 buffer layers. We show that high lattice mismatches can be accommodated in heterostructures grown by chemical methods. Clean interfaces were observed between the different layers. The influence of the buffer layer growth conditions on the final superconducting properties was studied in depth. We have proved that the main parameter affecting the YBCO critical currents is the SrTiO3 surface roughness, which promotes the nucleation of a/b axis grains and, as a consequence, the porosity of the YBCO film. On the other hand, an improved dependence of the critical current with perpendicular applied magnetic field was observed. This suggests a strengthened vortex pinning due to a higher density of a/b axis oriented grains.
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Y. Iijima, K. Kakimoto, Y. Yamada, T. Izumi, T. Saitoh, Y. Shiohara: Research and development of biaxially textured IBAD-GZO templates for coated superconductors. MRS Bull. 29(8)564 (2004).
M.W. Rupich, D.T. Verebelyi, W. Zhang, T. Kodenkandath, X. Li: Metalorganic deposition of YBCO films for second-generation high-temperature superconductor wires. MRS Bull. 29(8)572 (2004).
J.M. Phillips: Substrate selection for high-temperature superconducting thin films. J. Appl. Phys. 79, 1829 (1996).
M.P. Siegal, P.G. Clem, J.T. Dawley, R.J. Ong, M.A. Rodriguez, D.L. Overmyer: All solution-chemistry approach for YBa2Cu3O7-d-coated conductors. Appl. Phys. Lett. 80, 2710 (2002).
J.K. Chung, R.K. Ko, D.Q. Shi, H.S. Ha, H. Kim, K.K. Song, C. Park, S.H. Moon, S.I. Yoo: Use of SrTiO3 as a single buffer layer for RABiTS YBCO coated conductor. IEEE Trans. Appl. Supercond. 15, 3020 (2005).
H. Wang, S.R. Foltyn, P.N. Arendt, Q.X. Jia, J.L. MacManus-Driscoll, L. Stan, Y. Li, X. Zhang, P.C. Dowden: Microstructure of SrTiO3 buffer layers and its effects on superconducting properties of YBa2Cu3O7-d coated conductors. J. Mater. Res. 19, 1869 (2004).
M.P. Siegal, P.G. Clem, J.T. Dawley, J. Richardson, D.L. Overmyer: Optimizing SrTiO3 films on textured Ni substrates using chemical solution deposition. J. Mater. Res. 20, 910 (2005).
X.B. Zhu, S.M. Liu, H.R. Hao, L. Chen, W.H. Song, Y.P. Sun, K. Shi, Z.Y. Sun, S. Chen, Z. Han: Preparation of SrTiO3 buffer layers on BaxSr1-xTiO3 seed layers buffered Ni tapes by chemical solution deposition. Physica C 411, 143 (2004).
X.B. Zhu, L. Chen, S.M. Liu, W.H. Song, Y.P. Sun, K. Shi, Z.Y. Sun, S. Chen, Z. Han: Effect of seed layers on the preparation of SrTiO3 buffer layers on Ni tapes via sol-gel method. Physica C 415, 57 (2004).
R. Hühne, B. Holzapfel, A. Kursumovic, J.E. Evetts, A. Cavallaro, F. Sandiumenge, A. Pomar, T. Puig, X. Obradors: Preparation of MZrO3 (M = Ba,Sr) Buffer layers on surface oxidized Ni/NiO templates by PLD and MOD. IEEE Trans. Appl. Supercond. 15, 3024 (2005).
K. Matsumoto, A. Takechi, T. Ono, I. Hirabayashi, K. Osamura: Effect of perovskite oxide cap layer on superconducting properties of YBa2Cu3Ox films grown on mechanically polished SOE substrates. Physica C 392, 830 (2003).
O. Castaño, A. Cavallaro, A. Palau, J.C. Gonzalez, M. Rossell, T. Puig, F. Sandiumenge, N. Mestres, PiñS. ol, A. Pomar, X. Obradors: High-quality YBa2Cu3O7 thin films grown by trifluoroacetates metalorganic deposition. Supercond. Sci. Technol. 16, 45 (2003).
X. Obradors, T. Puig, A. Pomar, F. Sandiumenge, S. Piñol, N. Mestres, O. Castaño, M. Coll, A. Cavallaro, A. Palau, J. Gazquez, J.C. Gonzalez, J. Gutierrez, N. Roma, S. Ricart, J.M. Moreto, M.D. Rossell, G. van Tendeloo: Chemical solution deposition: a path towards low cost coated conductors. Supercond. Sci. Technol. 17, 1055 (2004).
T. Puig, J.C. Gonzalez, A. Pomar, N. Mestres, O. Castaño, M. Coll, J. Gazquez, F. Sandiumenge, S. Piñol, X. Obradors: Influence of growth conditions on the microstructure and critical currents of TFA-MOD YBa2Cu3O7 films. Supercond. Sci. Technol. 18, 1141 (2005).
J.C. Gonzalez, N. Mestres, T. Puig, J. Gazquez, F. Sandiumenge, X. Obradors, A. Usoskin, C. Jooss, H.C. Freyhardt, R. Feenstra: Biaxial texture analysis of YBa2Cu3O7-coated conductors by micro-Raman spectroscopy. Phys. Rev. B 70, 094525 (2004).
P.A. Langjahr, F.F. Lange, T. Wagner, M. Ruhle: Lattice mismatch accommodation in perovskite films on perovskite substrates. Acta Mater. 46, 773 (1998).
F. Sandiumenge, A. Cavallaro, GáJ. Zquez, T. Puig, X. Obradors, J. Arbiol, H.C. Freyhardt: Mechanisms of nanostructural and morphological evolution of CeO2 functional films by chemical solution deposition. Nanotechnology 16, 1809 (2005).
K. Tamura, Y. Yoshida, K. Sudoh, H. Kurosaki, N. Matsunami, I. Hirabayashi, Y. Takai: Influence of the microstructure of the SrTiO3 buffer layer on the superconducting properties of YBa2Cu3O7-x films. Physica C 357, 1386 (2001).
O. Castaño, A. Cavallaro, A. Palau, J.C. Gonzalez, M.D. Rossell, T. Puig, PiñS. ol, N. Mestres, F. Sandiumenge, A. Pomar, X. Obradors: Influence of porosity on the critical currents of trifluoroacetate-MOD YBa2Cu3O7 films. IEEE Trans. Appl. Supercond. 13, 2504 (2003).
A. Pomar, A. Díaz, M.V. Ramallo, C. Torrón, J.A. Veira, F. Vidal: Measurements of the paraconductivity in the a-direction of untwinned Y1Ba2Cu3O7-d single crystals. Physica C 218, 257 (1993).
A. Díaz, A. Pomar, G. Domarco, J. Maza, F. Vidal: Critical-current versus normal-state resistivity in granular Y1Ba2Cu3O7-d. Appl. Phys. Lett. 63, 1684 (1993).
A. Takechi, K. Matsumoto, K. Osamura: Oxide buffer layer with perovskite structure for YBa2Cu3O7-x coated conductors prepared by metal-organic deposition method. IEEE Trans. Appl. Supercond. 13, 2551 (2003).
A. Takechi, K. Matsumoto, K. Osamura: YBa2Cu3O7-x films on oxide buffer layer with perovskite structure prepared by metal-organic deposition method. Physica C 392, 895 (2003).
B. Dam, J.M. Huijbregtse, F.C. Klaassen, R.C.F. van der Geest, G. Doornbos, J.H. Rector, A.M. Testa, S. Freisem, J.C. Martinez, B. Stauble-Pumpin, R. Griessen: Origin of high critical currents in YBa2Cu3O7-d superconducting thin films. Nature 399, 439 (1999).
F.C. Klaassen, G. Doornbos, J.M. Huijbregtse, R.C.F. van der Geest, B. Dam, R. Griessen: Vortex pinning by natural linear defects in thin films of YBa2Cu3O7-d. Phys. Rev. B 64, 184523 (2001).
L. Civale, B. Maiorov, A. Serquis, J.O. Willis, J.Y. Coulter, H. Wang, Q.X. Jia, P.N. Arendt, MacManus-J.L. Driscoll, M.P. Maley, S.R. Foltyn: Angular-dependent vortex pinning mechanisms in YBa2Cu3O7 coated conductors and thin films. Appl. Phys. Lett. 84, 2121 (2004).
J.L. MacManus-Driscoll, S.R. Foltyn, Q.X. Jia, H. Wang, A. Serquis, L. Civale, B. Maiorov, M.P. Maley, D.E. Peterson: Strongly enhanced current densities in superconducting coated conductors of YBa2Cu3O7 + BaZrO3. Nature Mat. 3, 439 (2004).
J.M. Huijbregtse, B. Dam, R.C.F. van der Geest, F.C. Klaassen, R. Elberse, J.H. Rector, R. Griessen: Natural strong pinning sites in laser-ablated YBa2Cu3O7-d thin films. Phys. Rev. B 62, 1338 (2000).
C.J. van der Beek, M. Konczykowski, A. Abal’oshev, I. Abal’osheva, P. Gierlowski, S.J. Lewandowski, M.V. Indenbom, S. Barbanera: Strong pinning in high-temperature superconducting films. Phys. Rev. B 66, 024523 (2002).
M. Peurla, H. Huhtinen, P. Paturi: Magnetic relaxation and flux pinning in YBCO films prepared by PLD from a nanocrystalline target. Supercond. Sci. Technol. 18, 628 (2005).
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Pomar, A., Coll, M., Cavallaro, A. et al. All-chemical high-Jc YBa2Cu3O7 multilayers with SrTiO3 as cap layer. Journal of Materials Research 21, 1106–1116 (2006). https://doi.org/10.1557/jmr.2006.0133
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DOI: https://doi.org/10.1557/jmr.2006.0133