FY 1996
Presentations and Publications

A. Goyal, D. P. Norton, Q. He, M. Paranthaman, E. D. Specht, J. D. Budai, D. M. Kroeger, D. K. Christen, R. Feenstra, and J. R. Thompson (ORNL), “Fabrication of Biaxially Aligned Polycrystalline HTSC Using a New Process,” invited abstract submitted to MRS Fall Meeting, November 27–December 1, 1995, Boston.

J. W. Lue and M. S. Lubell (ORNL) and D. Aized, J. M. Campbell, and R. E. Schwall (American Superconductor), “Quenches in a High-Temperature Superconducting Tape and Pancake Coil,” Cryogenics 36, 379, November 5, 1996.

J. R. Thompson, D. Paul, Z. L. Wang, D. M. Kroeger, and D. K. Christen, “Thermal Stability and Annealing of Columnar Defects in Bi₂Sr₂Ca₁Cu₂O₈/Ag Superconductor,” Appl. Phys. Lett. 67, 1007 (1995).

Z. F. Ren, C. A. Wang, and J. H. Wang (SUNY Buffalo); D. J. Miller, J. D. Hettinger, and K. E. Gray (ANL); and D. K. Christen (ORNL), “Composition and Phase Development of Epitaxial Superconducting Tl_0.78Bi_0.22Sr_1.6Ba_0.4Ca₁Cu₃O_9– Thin Films by Laser Ablation and Post Annealing,” submitted to Physica C.

S. P. Tirumala and K. Salama (Univ. Of Houston), and D. M. Kroeger and D. F. Lee (ORNL), “Reaction Kinetics and Thermomechanical Processing of Bi-2223 Tapes Made from Aerosol Precursors of Various Stoichiometry,” abstract submitted to MRS 1996 Spring Meeting, April 8–12, San Francisco.

A. Goyal, D. P. Norton, E. D. Specht, M. Paranthaman, Q. He, P. M. Martin, J. D. Budai, D. M. Kroeger, D. K. Christen, F. A. List, and J. R. Thompson (ORNL), “Fabrication of Biaxially Textured Superconductors Using the RABiTS Process,” abstract submitted to MRS 1996 Spring Meeting, April 8–12, San Francisco.

E. Kadyrov and D. C. Larbalestier (Univ. of Wisconsin) and D. K. Christen (ORNL), “Effect of Heavy-Ion Irradiation on the Critical Current Density of Nb-47 wt % Ti Thin Films,” paper submitted to Appl. Phys. Lett.

M. N. Kunchur, D. K. Christen and C. E. Klabunde (ORNL), “Exploring the Dissipative Regime of Superconductors for Practical Current-Lead Applications,” Appl. Phys. Lett. 67, 848 (1995).

Q. He, D. K. Christen, C. E. Klabunde, M. Paranthaman, J. R. Thompson, A. Goyal, and D. M. Kroeger (ORNL); and J. E. Tkaczyk, K. W. Lay, and A. J. Pedraza (GE), “High-Current Superconducting Tl₁Ba₂Ca₂Cu₃O_y Thick Films on Polycrystalline Ag by Spin Coating,” Appl. Phys. Lett. 67, 294 (1995).

J. E. Tkaczyk, J. A. Sutliff, J. A. DeLuca, P. J. Bednarczyk, and C. L. Briant (GE); Z. L. Wang (Georgia Tech); and A. Goyal, D. M. Kroeger, D. H. Lowndes, and E. D. Specht (ORNL), “Texture and Transport in Spray Pyrolyzed TlBa₂Ca₂Cu₃O₉ Thick Films,” J. Mater. Res. 10 (9), September 1995.

J. R. Thompson (ORNL and Univ. of Tennessee), D. K. Christen and M. Paranthaman (ORNL), L. Krusin-Elbaum and A. D. Marwick (IBM), L. Civale (Centro Atomico Bariloche), R. Wheeler (Ohio State Univ.), J. G. Ossandon (Univ. Of Talca), and P. Lisowski and J. Ullmann (LANL), “The Impact of Tailored Defects on Length Scales and Current Conduction in High-T_c Superconductors,” paper to be published in Lecture Notes in Physics, ed. P. Klamut, J. Klamut, B. Veel, and B. Dabrowski, Springer-Verlag Publishers, Heidelberg, Germany, 1996.

D. K. Christen, Q. He, M. Paranthaman, C. E. Klabunde, E. D. Specht, R. Feenstra, A. Goyal, F. A. List, and D. M. Kroeger (ORNL); J. E. Tkaczyk and J. A. DeLuca (GE Corporate R&D); and Z. F. Ren, C. A. Wang, and J. H. Wang (SUNY-Buffalo), “Transport Properties of Tl-1223 Deposits for Possible Conductor Applications,” invited paper, published in Proceedings of the 7th U.S.-Japan Workshop on High-T_c Superconductors, Tsukuba, Japan, National Research Institute for Metals, Oct. 24–25, 1995, New Superconducting Materials Forum and Society for Non-Traditional Technology.

E. D. Specht and A. Goyal (ORNL), “Percolative Current Transport in 2D and 3D,” abstract submitted to the American Physical Society March Meeting, St. Louis, March 18–22, 1996.

D. M. Kroeger, A. Goyal, and E. D. Specht (ORNL), “Grain Boundary Misorientation Distributions and Percolation in HTS Conductors,” published in Proceedings of the 10th Anniversary HTS Workshop on Physics, Materials & Applications, Houston, March 12–16, 1996, World Scientific, p. 193.

S. S. Shoup (ORNL), “Growth of Epitaxial LaAlO₃ and CeO₂ Films Using Sol-Gel Precursors,” published in Proceedings of the 10th Anniversary HTS Workshop on Physics, Materials and Applications, Houston, March 12–16, 1996, World Scientific, p. 134.

M. Paranthaman, A. Goyal, F. A. List, E. D. Specht, D. M. Kroeger, Q. He, and D. K. Christen (ORNL) and J. E. Tkaczyk (GE Corporate Research and Development), “Growth of TlBa₂Ca₂Cu₃O_9–y Thick Superconducting Films with Extensive Local Biaxial Alignment on Smooth Ag Substrates,” abstract submitted to 1996 Applied Superconductivity Conference, Pittsburgh, August 25–30.

E. C. Jones (ORNL) and D. Aized, J. M. Campbell, G. Snitchler, G. N. Riley, Jr., C. J. Christopherson, R. E. Schwall, and A. P. Malozemoff (American Superconductor), “AC Losses in Three-Meter-Long Unbridged Twisted Multifilamentary Bi₂Sr₂Ca₂Cu₃O_x/Ag Tapes,” abstract submitted to 1996 Applied Superconductivity Conference, Pittsburgh, August 25–30.

M. S. Walker, D. W. Hazelton, M. T. Gardner, J. R. Rice, D. G. Walker, R. S. Sokolowski, N. J. Ternullo, and C. M. Trautwein (IGC) and F. A. List (ORNL), “Performance of Coils Wound from Reacted Long Lengths of Low-Cost, Surface-Coated BSCCO-2212 Conductor,” abstract submitted to 1996 Applied Superconductivity Conference, Pittsburgh, August 25–30.

S. P. Mehta and J. A. Ebert (Waukesha Electric Systems); M. S. Walker, F. S. Murray, and D. W. Hazelton (IGC); R. C. Longsworth (IGC/APD Cryogenics); R. C. Johnson (Rochester Gas and Electric); J. K. Nelson, R. C. Degeneff, and S. J. Salon (Rensselaer); and B. W. McConnell, J. Hsu, and S. W. Schwenterly (ORNL), “Construction of a 1 MVA HTS Demonstration Transformer,” abstract submitted to 1996 Applied Superconductivity Conference, Pittsburgh, August 25–30.

D. K. Christen (ORNL), “Local Texture, Current Flow, and Superconductive Transport Properties of Tl-1223 Deposits on Practical Substrates,” invited talk, published in Proceedings of the 10th Anniversary HTS Workshop on Physics, Materials, and Applications, Houston, March 12–16, 1996, World Scientific, p. 193.

A. Goyal, E. D. Specht, D. M. Kroeger (ORNL), “Effect of Texture on Grain Boundary Misorientation Distributions in Polycrystalline High Temperature Superconductors,” Appl. Phys. Lett. 68 (5), 29 January 1996.

S. S. Shoup, M. Paranthaman, D. B. Beach, E. D. Specht, and R. K. Williams (ORNL), “Sol-Gel Synthesis of LaAlO₃: Epitaxial Growth of LaAlO₃ Thin Films on SrTiO₃ (100),” paper submitted to J. of Mater. Res.

R. N. Bhattacharya, P. A. Parilla, D. L. Schulz, R. D. Blaugher, and D. S. Ginley (National Renewable Energy Laboratory) and M. Paranthaman (ORNL), “Thallium Oxide Superconductors via an Electrodeposition Process,” abstract submitted to 1996 Applied Superconductivity Conference, Pittsburgh, August 25–30.

B. W. McConnell (ORNL), R. Johnson (Rochester Gas & Electric), S. P. Mehta (Waukesha Division, General Signal Corporation), and M. S. Walker (Intermagnetics General), “Status of Superconductivity Transformer Development,” published in Proceedings of the American Power Conference, Chicago, Illinois, April 9–11, 1996, APC, Vol. 58, p. 89.

J. R. Thompson (ORNL and University of Tennessee), L. Krusin-Elbaum and G. Blatter (IBM), L. Civale (Centro Atomico Bariloche), and D. K. Christen (ORNL), “Dynamics of Vortices Pinned by Columnar Defects in YBa₂Cu₃O_7– Crystals,” Czech. J. Phys. 46, 1661 (1996).

A. Goyal (ORNL), “Application of OIM to High Temperature Superconductors,” invited paper presented to Frontiers of Electron Microscopy in Materials Science Conference, June 4–7, 1996.

F. A. List, P. M. Martin, and D. M. Kroeger (ORNL), “An Automated System for Current-Voltage Characterization of Ceramic Superconductors,” Rev. Sci. Instrum. 67 (9), 187, September 1996.

M. Paranthaman, A. Goyal, D. P. Norton, F. A. List, E. D. Specht, D. K. Christen, D. M. Kroeger, J. D. Budai, Q. He, D. F. Lee, and P. M. Martin (ORNL), “Development of Biaxially Textured Buffer Layers on Rolled-Ni Substrates for High Current YBa₂Cu₃O_x–y Coated Conductors,” abstract submitted to 9th International Symposium on Superconductivity (ISS '96), Sapporo, Hokkaido, Japan, October 21–24, 1996.

A. Goyal, E. D. Specht, and D. M. Kroeger (ORNL), “Importance of Recrystallization Textures and Grain Boundary Character in High Temperature Superconductors,” abstract submitted to ReX-96 International Conference on Recrystallization and Related Phenomena, Monterey, Calif., October 21–24, 1996.

N. H. Hur and J. R. Thompson (ORNL and Univ. of Tennessee) and M. Paranthaman and D. K. Christen (ORNL), “Superconductivity in the Indium-Doped Tl-1223 Phase: (Tl_0.8In_0.2)(Sr_0.8Ba_0.2)₂Ca₂Cu₃)_9–,” Physica C 268, 266–270 (1997).

E. D. Specht, A. Goyal, and D. M. Kroeger (ORNL) and A. Mogro-Campero, P. J. Bednarczyk, J. E. Tkaczyk, and J. A. DeLuca (GE Research and Development Center), “Critical Current, Film Thickness, and Grain Alignment for Spray-Pyrolyzed Films of TlBa₂Ca₂Cu₃O_x,” Physica C 270 91–96 (1996).

A. Goyal, D. P. Norton, J. D. Budai, M. Paranthaman, E. D. Specht, D. M. Kroeger, D. K. Christen, F. A. List, P. M. Martin, C. E. Klabunde, E. Hatfield, and V. K. Sikka (ORNL); Q. He and B. Saffian (Univ. Of Tennessee); and D. F. Lee (Oak Ridge Institute for Science and Education), “Fabrication of High Critical Current Density Superconducting Tapes by Epitaxial Deposition of YBCO Thick Films on Biaxially Textured Metal Substrates,” Appl. Phys. Lett. 69, 1795 (1996).

D. P. Norton, A. Goyal, J. D. Budai, D. K. Christen, D. M. Kroeger, E. D. Specht, M. Paranthaman, C. E. Klabunde, B. C. Sales, and F. A. List (ORNL); Q. He and Bernd Saffian (Univ. Of Tennessee); and D. F. Lee (Oak Ridge Institute for Science and Education), “Epitaxial YBa₂Cu₃O₇ (001) Ni: An Approach to High Critical Current Density Superconducting Tapes,” Science 274, 755–57, November 1, 1996.

M. Paranthaman, C. Vallet, F. A. List, A. Goyal, E. D. Specht, D. M. Kroeger, and D. K. Christen (ORNL), “Growth of TlBa₂Ca₂Cu₃O_9–y Superconducting Films with Local Biaxial Alignment Extending up to 5 mm on Ag Substrates Using a Spray Pyrolysis Technique,” J. Mater. Res. 12 (3), March 1997 (in press).

F. A. List and D. M. Kroeger (ORNL) and V. Selvamanickam (IGC), “Hysteresis of the Transport Critical Current of (Tl,Pb)-(Sr,Ba)-Ca-Cu-O and Bi-Sr-Ca-Cu-O Conductors: Effects of Temperature and Magnetic Field,” submitted to Physica C.

A. Goyal, D. P. Norton, M. Paranthaman, E. D. Specht, J. D. Budai, D. M. Kroeger, D. K. Christen, F. A. List, and P. M. Martin (ORNL); Q. He and B. Saffian (Univ. Of Tennessee); and D. F. Lee and S. Shoup (Oak Ridge Institute of Science and Education), “Fabrication of High Critical Current Density Superconducting Tapes by Epitaxial Deposition of YBCO Thick Films on Biaxially Textured Metal Substrates,” abstract submitted to 9th International Symposium on Superconductivity, Sapporo, Hokkaido, Japan, October 21–24, 1996.

A. Goyal, E. D. Specht, and D. M. Kroeger (ORNL), “Grain Boundary Networks and Percolative Current Flow in Polycrystalline HTS Conductors,” abstract submitted to 9th International Symposium on Superconductivity, Sapporo, Hokkaido, Japan, October 21–24, 1996.

D. M. Kroeger, D. F. Lee, A. Goyal, and E. D. Specht (ORNL), “Processing and Long-Range Critical Current Transport in High Temperature Superconductors,” being published as book chapter in Proceedings of the First Pan-American Advanced Studies Institute, Kluwer Academic Publishers.

A. Goyal, E. D. Specht, D. K. Christen, and D. M. Kroeger (ORNL) and A. Pashitski, A. Polyanskii, and D. C. Larbalestier (University of Wisconsin Applied Superconductivity Center), “Percolative Current Flow in High J_c, Polycrystalline High Temperature Superconductors,” J. Metals 48, 24–28.

Q. He (Univ. Of Tennessee) and D. K. Christen, J. D. Budai, E. D. Specht, D. F. Lee, A. Goyal, D. P. Norton, M. Paranthaman, and F. A. List (ORNL), “Deposition of Biaxially Oriented Metal and Oxide Buffer-Layer Films on Textured Ni Tapes: New Substrates for High-Current, High-Temperature Superconductors,” Physica C 275, 155–61 (1997).

Q. Li, G. N. Riley, Jr., R. D. Parella, S. Fleshler, M. W. Rupich, and W. L. Carter (American Superconductor Corporation); J. O. Willis, J. Y. Coulter, and J. F. Bingert (LANL); V. K. Sikka (ORNL); and J. A. Parrell and D. C. Larbalestier (University of Wisconsin), “Progress in Superconducting Performance of Rolled Multifilamentary Bi-2223 HTS Composite Conductors,” submitted to IEEE Trans. Appl. Supercon.

J. W. Lue, M. S. Lubell, E. C. Jones, J. A. Demko, D. M. Kroeger, and P. M. Martin (ORNL) and Uday Sinha and R. L. Hughey (Southwire Company), “Test of Two Prototype High-Temperature Superconducting Transmission Cables,” paper presented at the 1996 Applied Superconductivity Conference, August 25–30, Pittsburgh, and to be published in conference proceedings by IEEE Transactions on Applied Superconductivity.

M. S. Walker, D. W. Hazelton, M. T. Gardner, J. A. Rice, D. G. Walker, C. M. Trautwein, N. J. Ternullo, X. Shi, J. M. Weloth, and R. S. Sokolowski (IGC) and F. A. List (ORNL), “Performance of Coils Wound from Long Lengths of Surface-Coated, Reacted, BSCCO-2212 Conductor,” paper presented at the 1996 Applied Superconductivity Conference, August 25–30, Pittsburgh, and to be published in conference proceedings by IEEE Transactions on Applied Superconductivity.

M. Paranthaman, K. A. David, and T. B. Lindemer (ORNL), “Phase Equilibria of the MgO-Cu₂O-CuO System,” Mater. Res. Bull. 32, 165–73 (1997).

J. G. Ossandon and J. R. Thompson (ORNL and Univ. Of Tennessee, “Stability of Supercurrents in BiSrCaCuO (Bi-2212) High-T_c Superconductor with Artificially Created Defects,” paper submitted to Superlattices Microstruct.

M. N. Kunchur (U.S. Air Force/Wright Laboratory and University of South Carolina), D. K. Christen (ORNL), and B. I. Ivlev (Landau Institute for Theoretical Physics), “Transport Behavior in Superconductors at Extreme Dissipation Levels,” paper submitted to Proceedings of the International Symposium on Advances in Superconductivity: New Materials, Critical Currents, and Devices, held at the Tata Institute of Fundamental Research, Bombay, India, September 1996.

M. Paranthaman, A. Goyal, F. A. List, E. D. Specht, D. F. Lee, P. M. Martin, Q. He, D. K. Christen, D. P. Norton, J. D. Budai, and D. M. Kroeger (ORNL), “Growth of Biaxially Textured Buffer Layers on Rolled-Ni Substrates by Electron Beam Evaporation,” submitted to Physica C.

A. Goyal, D. P. Norton, J. D. Budai, M. Paranthaman, E. D. Specht, D. M. Kroeger, D. K. Christen, Q. He, B. Saffian, F. A. List, D. F. Lee, P. M. Martin, C. E. Klabunde, E. Hatfield, and V. K. Sikka (ORNL), “High Critical Current Density Superconducting Tapes by Epitaxial Deposition of YBa₂Cu₃O_x Thick Films on Biaxially Textured Metals,” Appl. Phys. Lett. 69 (12), September 16, 1996.

D. K. Christen, D. P. Norton, A. Goyal, J. D. Budai, Q. He, C. E. Klabunde, D. M. Kroeger, M. Paranthaman, B. Saffian, and E. D. Specht (ORNL), “Biaxially Oriented Metallic Tape Substrates for High-Temperature Superconductors,” Czech. J. Phys., 46, Suppl. S3, 1531 (1996).

R. A. Hawsey (ORNL) and D. E. Peterson (LANL), “Coated Conductors: The Next Generation of High-T_c Wires,” Superconductor Industry, 23–29 (Fall 1996).

A. Goyal, E. D. Specht, and D. M. Kroeger (ORNL), J. E. Tkacyzk, C. L. Briant, and J. A. DeLuca (GE), “Crystallization of Colonies of Locally Alligned Grains During Thallination of Spray-Pyrolyzed TiBa₂Ca₂Cu₃O_x Thick Films,” Appl. Phys. Lett. 67 2563–65.

R. A. Hawsey, J. D. Budai, D. K. Christen, H. R. Kerchner, D. P. Norton, D. M. Kroeger, A. Goyal, F. A. List, P. M. Martin, R. K. Williams, D. F. Lee, M. S. Lubell, J. W. Lue, S. W. Schwenterly, M. Paranthaman, B. W. McConnell, Q. He, H. Hsu, D. R. James, E. C. Jones, H. E. McCoy, B. Saffian, S. Shoup, V. K. Sikka, E. D. Specht (ORNL), ORNL Superconducting Technology Program for Electric Power Systems--Annual Report for FY 1995, Oak Ridge National Laboratory, ORNL/HTSPC-7, May 1996.

D. M. Kroeger and M. Paranthaman (ORNL), Proceedings of the U.S. DOE HTS Wire Development Workshop, January 31–February 1, 1996, Tampa, Fla., Oak Ridge National Laboratory, CONF-960188, June 1996.

L. Krusin-Elbaum (IBM), L. Civale (Centro Atomico Bariloche), J. R. Thompson (ORNL), and C. Feild (IBM), “Accommodation of Vortices to Columnar Defects: Evidence for Large Entropic Reduction of Vortex Localization,” Phys. Rev. B 53 (17), 11744–50 (May 1, 1996).

M. Paranthaman and B. C. Chakoumakos (ORNL), “Crystal Chemistry of HgBa₂Ca_n–1Cu_nO_2n+2+ (n=1,2,3,4) Superconductors,” J. Solid State Chem. 122, 221–30 (1996).

S. W. Schwenterly and V. Y. Wildon, Rotor Instrumentatioin Study for High-Temperature Superconducting Generators, Oak Ridge National Laboratory, ORNL/TM-13229, June 1996.