Skip to main content Accessibility help

Solution-processed lanthanum zirconium oxide as a barrier layer for high Ic-coated conductors

  • Srivatsan Sathyamurthy (a1), Mariappan Paranthaman (a1), Lee Heatherly (a1), Patrick M. Martin (a1), E.D. Specht (a1), Amit Goyal (a1), Thomas Kodenkandath (a2), Xiaoping Li (a2) and Martin W. Rupich (a2)...


High-quality lanthanum zirconium oxide (La2Zr2O7 or LZO) films have been deposited and processed on Ni–W substrates using a sol-gel processing approach. It has been demonstrated that crack-free coatings with thicknesses up to 100 nm can be processed in a single step, while thicker coatings (200–225 nm) were processed using a multiple coating and annealing process. Using simulated metalorganic deposition (MOD)-YBa2Cu3O7−δ (YBCO) processing conditions, the barrier properties of the sol-gel LZO coating with a thickness of 120 nm were found to be comparable to that of the standard 3-layer buffer stack deposited using physical vapor deposition. Secondary ion mass spectroscopy depth profile analysis of LZO films annealed in oxygen-18 shows that LZO effectively stops the diffusion of Ni within the first 80–100 nm. Using MOD processes, a CeO2 cap layer and superconducting YBCO layer were deposited on sol-gel LZO/Ni–W. For the first time, using such an all-solution conductor architecture, a critical current (Ic) of 140 A/cm with a corresponding critical current density (Jc) of 1.75 MA/cm2 has been demonstrated. Using a very thin Y2O3 seed layer (∼10 nm) deposited by electron beam evaporation; improved texture quality in the LZO layers has been demonstrated. The performance of the LZO deposited on these samples was evaluated using a sputtered CeO2 cap layer and MOD YBCO layer. Critical currents of up to 255 A/cm (3.2 MA/cm2) with 0.8-μm-thick YBCO films have been demonstrated, comparable to the performance of films grown using physical vapor deposited yttria stabilized zirconia as a barrier layer. Similar experiments using an MOD-CeO2 cap layer and MOD-YBCO layer yielded critical currents of 200 A/cm (2.5 MA/cm2) with 0.8-μm-thick YBCO films.


Corresponding author

a) Address all correspondence to this author. e-mail:


Hide All
1.Iijima, Y., Tanabe, N., Kohno, O., Ikeno, Y.: In-plane aligned YBCO thin films deposited on polycrystalline metallic substrates. Appl. Phys. Lett. 60, 769 (1992).
2.Arendt, P.N., Foltyn, S.R., Civale, L., DePaula, R.F., Dowden, P.C., Groves, J.R., Holesinger, T.G., Jia, Q.X., Kreiskott, Z., Stan, L., Usov, I., Wang, H., Coulter, J.Y.: High critical current YBCO coated conductors based on IBAD MgO. Physica C 412, 795 (2004).
3.Goyal, A., Norton, D.P., Budai, J.D., Paranthaman, M., Specht, E.D., Kroeger, D.M., Christen, D.K., He, Q., Saffian, B., List, F.A., Lee, D.F., Martin, P.M., Klabunde, C.E., Hatfield, E., Sikka, V.K.: High critical current density superconducting tape by epitaxial deposition of YBCO thin films on biaxially textured metals. Appl. Phys. Lett. 69, 1795 (1996).
4.Norton, D.P., Goyal, A., Budai, J.D., Christen, D.K., Kroeger, D.M., Specht, E.D., He, Q., Saffian, B., Paranthaman, M., Klabunde, C.E., Lee, D.F., Sales, B.C., List, F.A.: Epitaxial YBa2Cu3O7−δ on biaxially textured Ni(001): An approach to superconducting tapes with high critical current density. Science 274, 755 (1996).
5.Prusseit, W., Sigl, G., Nemetschek, R., Hoffman, C., Handke, J., Lumkemann, A., Kinder, H.: Commercial coated conductor fabrication based on inclined substrate deposition. IEEE Trans. Appl. Supercond. 15, 2608 (2005).
6.Ma, B.H., Uprety, K.K., Koritala, R.E., Fisher, B.L., Dorris, S.F., Miller, D.J., Maroni, V.A., Balachandran, U.B.: Growth and properties of YBCO coated conductors fabricated using inclined substrate deposition. IEEE Trans. Appl. Supercond. 15, 2970 (2005).
7.Dimos, D., Choudhary, P., Mannhart, J., Goues, F.K. Le: Orientation dependence of grain boundary critical currents in YBa2Cu3O7−δ bicrystals. Phys. Rev. Lett. 61, 219 (1988).
8.Verebelyi, D.T., Schoop, U., Thieme, C., Li, X., Zhang, W., Kodenkandath, T., Malezemoff, A.P., Nguyen, N., Siegel, E., Buczek, D., Lynch, J., Scudiere, J., Rupich, M., Goyal, A., Specht, E.D., Martin, P.M., Paranthaman, M.: Uniform performance of continuously processed MOD-YBCO-coated conductors using a textured Ni–W substrate. Supercond. Sci. Tech. 16, L19 (2003).
9.Siegal, M.P., Clem, P.G., Dawley, J.T., Ong, R.J., Rodriguez, M.A., Overmyer, D.L.: All solution-chemistry approach to YBa2Cu3O7−δ coated conductors. Appl. Phys. Lett. 80, 2710 (2002).
10.Sathyamurthy, S., Paranthaman, M., Bhuiyan, M.S., Payzant, E.A., Lee, D.F., Goyal, A., Li, X., Kodenkandath, T., Schoop, U., Rupich, M.: Solution deposition approach to high Jc coated conductor fabrication. IEEE Trans. Appl. Supercond. 15, 2974 (2005).
11.Sathyamurthy, S., Paranthaman, M., Aytug, T., Kang, B.W., Martin, P.M., Goyal, A., Kroeger, D.M., Christen, D.K.: Chemical solution deposition of lanthanum zirconate buffer layers on biaxially textured Ni–1.7% Fe–3% W substrates for coated conductor fabrication. J. Mater. Res. 17, 1543 (2002).
12.Sathyamurthy, S., Paranthaman, M., Zhai, H.Y., Christen, H.M., Martin, P.M., Goyal, A.: Lanthanum zirconate: A single buffer layer processed by solution deposition for coated conductor fabrication. J. Mater. Res. 17, 2181 (2002).
13.Sathyamurthy, S., Paranthaman, M., Zhai, H.Y., Kang, S., Aytug, T., Cantoni, C., Leonard, K.J., Payzant, E.A., Christen, H.M., Goyal, A., Li, X., Schoop, U., Kodenkandath, T., Rupich, M.W.: Chemical solution deposition of lanthanum zirconate barrier layers applied to low cost coated conductor fabrication. J. Mater. Res. 19, 2117 (2004).
14.Rupich, M.W., Verebelyi, D.T., Zhang, W., Kodenkandath, T., Li, X.P.: Metalorganic deposition of YBCO films second generation high temperature superconductor wires. MRS Bull. 29, 572 (2004).
15.Lee, D.F., Leonard, K.J., Heatherly, L., Yoo, J., List, F.A., Rutter, N., Cook, S.W., Sathyamurthy, S., Paranthaman, M., Martin, P.M., Goyal, A., Kroeger, D.M.: Reel-to-reel exsitu conversion of high critical current density electron beam co-evaporated BaF2 precursors on RABiTS. Supercond. Sci. Technol. 17, 386 (2004).
16.Bhuiyan, M.S., Paranthaman, M., Sathyamurthy, S., Aytug, T., Kang, S., Lee, D.F., Goyal, A., Payzant, E.A., Salama, K.: MOD approach for the growth of epitaxial CeO2 buffer layers on biaxially textured Ni–W substrates for YBCO coated conductors. Supercond. Sci. Tech. 16, 1305 (2003).



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed