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Phase evolution in Ba–(Nd,Eu,Gd)–Cu–O-coated conductor films

Published online by Cambridge University Press:  31 January 2011

W. Wong-Ng ,
I. Levin ,
J. Ritter ,
L.P. Cook ,
G. Liu ,
M. Otani ,
M. Vaudin ,
C. Lucas ,
S.P. Diwanji  and
R. Feenstra
W. Wong-Ng*
Affiliation:
Materials Science and Engineering Laboratory, National Institutes of Standards and Technology, Gaithersburg, Maryland 20899
I. Levin
Affiliation:
Materials Science and Engineering Laboratory, National Institutes of Standards and Technology, Gaithersburg, Maryland 20899
J. Ritter
Affiliation:
Materials Science and Engineering Laboratory, National Institutes of Standards and Technology, Gaithersburg, Maryland 20899
L.P. Cook
Affiliation:
Materials Science and Engineering Laboratory, National Institutes of Standards and Technology, Gaithersburg, Maryland 20899
G. Liu
Affiliation:
Materials Science and Engineering Laboratory, National Institutes of Standards and Technology, Gaithersburg, Maryland 20899
M. Otani
Affiliation:
Materials Science and Engineering Laboratory, National Institutes of Standards and Technology, Gaithersburg, Maryland 20899
M. Vaudin
Affiliation:
Materials Science and Engineering Laboratory, National Institutes of Standards and Technology, Gaithersburg, Maryland 20899
C. Lucas
Affiliation:
Chemistry Department, University of Maryland, College Park, Maryland 20742
S.P. Diwanji
Affiliation:
Chemistry Department, University of Maryland, College Park, Maryland 20742
R. Feenstra
Affiliation:
Materials Science & Engineering Laboratory, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Phases that are in equilibrium with BaR2CuO6+x (R=lanthanides and Y), such as the “green-phase” and “brown-phase” structural variants of BaR2CuO5 in bulk samples, are attractive choices for flux-pinning for coated conductor applications because of the guaranteed chemical stability. In films, high-temperature x-ray diffraction studies of Ba2RCu3O6+x superconductor deposited on SrTiO3 substrate using the trifluoroacetate solution method demonstrate that while BaNd2CuO5 (“brown-phase” structure) develops at 735 °C and 100 Pa pO2, neither BaGd2CuO5 nor Ba(Nd1/3Eu1/3Gd1/3)2CuO5 (both green-phase structure) form at these conditions. As a result, Ba2(Nd1/3Eu1/3Gd1/3)Cu3O6+x in thin films is in equilibrium with the brown-phase, and Ba2GdCu3O6+x is in equilibrium with Gd2O3 in the Ba–Gd–Cu–O system, in contrast to the bulk systems. Different phase relationships in the vicinity of the Ba2RCu3O6+x phase imply different phases are available for flux-pinning applications. These differences will need to be considered carefully in designing optimized superconducting coated conductors.

Keywords

Electronic materialPhase equilibriaSuperconducting
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 8 , August 2008 , pp. 2067 - 2071
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

1Rupich, M.W., Zhang, W., Li, X., Kodenkandath, T., Verebelyi, D.T., Schoop, U., Thieme, C., Teplitsky, M., Lynch, J., Nguyen, N., Siegal, E., Scudiere, J., Maroni, V., Venkataraman, K., Miller, D.Holesinger, T.G.: Progress on MOD/RABiTSTM 2G HTS wire. Physica C 412–414, 877 2004Google Scholar
2Goyal, 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., Hartfield, E.Sikka, V.K.: High critical current density superconducting tapes by epitaxial deposition of YBa2Cu3Ox thick films on biaxially textured metals. Appl. Phys. Lett. 69, 1795 1996CrossRefGoogle Scholar
3Goyal, A., Schoop, U.Paranthaman, P.: The RABiTS Approach: Using rolling-assisted biaxially textured substrates for high-performance YBCO superconductors. MRS Bull. 29(8), 552 2004Google Scholar
4Arendt, P.N., Foltyn, S.R., Civale, L., DePaula, R.F., Dowden, P.C., Groves, J.R., Holesinger, T.G., Jia, Q.X., Kreiskott, S., Stan, L., Usov, I., Wang, H.Coulter, J.Y.: High critical current YBCO coated conductors based on IBAD MgO. Physica C 412–414, 795 2004CrossRefGoogle Scholar
5Foltyn, S.R., Peterson, E.J., Coulter, J.Y., Arendt, P.N., Jia, Q.X., Dowden, P.C., Maley, M.P., Wu, X.D.Peterson, D.E.: Influence of deposition rate on the properties of thick YBa2Cu3O7-d films produced by pulsed laser deposition. J. Mater. Res. 12, 2941 1997Google Scholar
6Muralidhar, M., Sakai, N., Chikumoto, N., Jirsa, M., Machi, T., Nishiyama, M., Wu, Y.Murakami, M.: New type of vortex pinning structure effective at very high magnetic fields. Phys. Rev. Lett. 89(23), 237001 2002Google Scholar
7Goto, T., Sato, E., Watanabe, K., Nishijima, G., Matsui, Y., Nagai, T.Tsuruta, C.: High critical-current density and ultra high-voltage TEM study of filamentary 0.1 at.% Zr-doped (Nd0.33Eu0.33Gd0.33)Ba2Cu3Ox superconductors. Physica C 425, 166 2005CrossRefGoogle Scholar
8Hu, A., Koblischka, M.R., Yao, X., Zhou, H., Winter, M., Hartmann, U.Murakami, M.: Recent progress on compositional nanostripes of REBa2Cu3O7−x (RE = Sm,Eu,Ge) superconductors. Supercond. Sci. Technol. 19, S580 2006CrossRefGoogle Scholar
9Cai, C., Holzapfel, G., Hänisch, J., Fernández, L.Schlutz, L.: High critical current density and its field dependence in mixed rare earth (Nd,Eu,Gd)Ba2Cu3O7−δ thin films. App. Phys. Lett. 84, 377 2004CrossRefGoogle Scholar
10Wong-Ng, W., Cook, L.P.Suh, J.: Subsolidus phase relationships of the BaO–Y2O3–CuOx system under carbonate-free conditions at p O2 = 100 Pa and at p O2= 21 kPa. Physica C 377, 107 2002CrossRefGoogle Scholar
11Wong-Ng, W., Cook, L.P., Suh, J., Coutts, R., Stalick, J.K., Levin, I.Huang, Q.: BaO–Nd2O3–CuOx subsolidus equilibria under carbonate-free conditions at pO2 = 100 Pa and at pO2 = 21 kPa. J. Solid State Chem. 173, 476 2003Google Scholar
12Wong-Ng, W., Cook, L.P., Suh, J.Kaduk, J.A.: Phase relationships in the BaO–Sm2O3–CuOx system under 100 Pa O2. Physcia C 405, 47 2004CrossRefGoogle Scholar
13Wong-Ng, W., Cook, L.P.Suh, J.: BaO–R2O3–CuOx (R = Gd and Er) subsolidus equilibria under carbonate-free conditions at pO2 = 100 Pa. Solid State Sci. 6, 1211 2004Google Scholar
14Wong-Ng, W., Yang, Z., Cook, L.P., Frank, J.Loung, M.: Subsolidus phase relationships of the BaO–R2O3–CuOz (R = Eu, Dy, and Ho) systems under carbonate-free conditions at T = 810 °C and p O2 = 100 Pa. Physica C 439, 93 2006CrossRefGoogle Scholar
15Wong-Ng, W., Yang, Z.Cook, L.P.: Subsolidus phase relationships of the BaO–R2O3–CuOz (R = Tm and Yb) systems under carbonate-free conditions at p O2 = 100 Pa, and T = 750 °C and 810 °C. J. Alloys Compd. 437, 58 2007CrossRefGoogle Scholar
16Wong-Ng, W., Levin, I., Otani, M., Vaudin, M.D., Cook, L.P., Cline, J., Feenstra, R.Holesinger, T.: Phase relations in the Ba–Y–Cu–O films on SrTiO3 for the ex situ BaF2 process. Appl. Phys. Lett. 90, 102508 2007Google Scholar
17Yoshizumi, M., Seleznev, I.Cima, M.J.: Reactions of oxyfluoride precursors for the preparation of barium yttrium cuprate films. Physica C 403, 191 2004CrossRefGoogle Scholar
18Wong-Ng, W., Kuchinski, M.A., McMurdie, H.F.Paretzkin, B.: Crystal chemistry and phase equilibrium studies of BaO–1/2R2O3–CuO. X-ray powder characterization of BaR2CuO5 and related compounds. Powder Diffr. 4, 2 1989CrossRefGoogle Scholar
19Wong-Ng, W., Levin, I., Cook, L.P.Feenstra, R.: Nature of the transient BaF2-related phases in the “BaF2” processing of Ba2YCu3O7−x superconductors. Appl. Phys. Lett. 88, 102507 2006Google Scholar
20Christen, H.M., Silliman, S.D.Harchavardhan, K.S.: Continuous compositional-spread technique based on pulsed-laser deposition and applied to the growth of epitaxial films. Rev. Sci. Instrum. 72, 2673 2001CrossRefGoogle Scholar