Publications

Physica C: Superconductivity and its Applications

Siegal, Michael P.; Dawley, Jeffrey T.; Clem, Paul G.; Overmyer, Donald L.

The superconducting and structural properties of YBa2Cu 3O7-δ (YBCO) films grown from chemical solution deposited (CSD) metallofluoride-based precursors improve by using high heating rates to the desired growth temperature. This is due to avoiding the nucleation of undesirable a-axis grains at lower temperatures, from 650 to 800 °C in p(O2) = 0.1%. Minimizing time spent in this range during the temperature ramp of the ex situ growth process depresses a-axis grain growth in favor of the desired c-axis orientation. Using optimized conditions, this results in high-quality YBCO films on LaAlO3(100) with J c(77 K)∼3 MA/cm2 for films thicknesses ranging from 60 to 140 nm. In particular, there is a dramatic decrease in a-axis grains in coated-conductors grown on CSD Nb-doped SrTiO3(100) buffered Ni(100) tapes. © 2003 Elsevier B.V. All rights reserved.

Proposed for publication in Physica C.

Dawley, Jeffrey T.; Dawley, Jeffrey T.; Clem, Paul G.; Boyle, Timothy J.; Steele, Leigh A.; Overmyer, Donald L.; Siegal, Michael P.

Abstract not provided.

Proposed for publication in the Journal of Materials Research.

Clem, Paul G.; Dawley, Jeffrey T.; Clem, Paul G.

Abstract not provided.

Dawley, Jeffrey T.; Clem, Paul G.; Siegal, Michael P.; Overmyer, Donald L.; Rodriguez, Marko A.

Abstract not provided.

Journal of Materials Research

Dawley, Jeffrey T.; Clem, Paul G.; Siegal, Michael P.; Overmyer, Donald L.

In this investigation, YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) films were fabricated via a metal acetate, trifluoroacetic acid based sol-gel route, and spin-coat deposited on (100) LaAlO{sub 3} with a focus on maximizing J{sub c}, while minimizing processing time. We demonstrate that the use of a low pO{sub 2} atmosphere during the pyrolysis stage can lead to at least a tetiold reduction in pyrolysis time, compared to a 1 atm. O{sub 2} ambient. High-quality YBCO films on LaAlO{sub 3}, with J{sub c} values up to 3 MA/cm{sup 2} at 77 K, can be routinely crystallized from these rapidly pyrolyzed films.