NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Europan Campus Rottal-InnBeitrag (Sammelband oder Tagungsband)
T. Holesinger, B. Gibbons, S. Foltyn, P. Arendt, V. Matias, Jia, Q. X., L. Stan, Sascha Kreiskott, J. Coulter, R. DePaula, Feenstra, R., Gapud, A. A., Specht, E. D., Kodenkandath, T., Zhang, W.
TEM studies of interfacial microstructures in YBa2Cu3O7 coated conductors
Proceedings of the International Symposium "Interfaces in Electronic Materials", vol. 2003-31
2006
NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Europan Campus Rottal-InnZeitschriftenartikel
Maiorov, B., B. Gibbons, Sascha Kreiskott, V. Matias, Jia, Q. X., T. Holesinger, L. Civale
Influence of tilted geometries on the critical current in superconducting thin films
IEEE Transactions on Appiled Superconductivity, vol. 15, pp. 2582-2585
2005
NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Europan Campus Rottal-InnZeitschriftenartikel
Sascha Kreiskott, P. Arendt, J. Coulter, P. Dowden, S. Foltyn, B. Gibbons, V. Matias, C. Sheehan
Reel-to-reel preparation of ion-beam assisted deposition (IBAD)-MgO based coated conductors
Superconductor Science and Technology, vol. 17, no. 5
2004
DOI: 10.1088/0953-2048/17/5/008
Abstract anzeigen
We report on our efforts in developing and scaling-up the systems for IBAD-MgO based coated conductor fabrication. The overall fabrication process involves a number of different processes including: electropolishing of the substrates; barrier-layer, seed-layer, and IBAD-MgO deposition by e-beam evaporation; and pulsed laser deposition of buffer and YBCO layers. All processes are realized in reel-to-reel processing systems. Latest results have shown that the IBAD-MgO approach yields coated conductor performance comparable to the best results achieved elsewhere to date.
NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Europan Campus Rottal-InnZeitschriftenartikel
Alp Findikoglu, Sascha Kreiskott, Riele, P. te Riele, V. Matias
Role of beam divergence and ion-to-molecule flux ratio in ion-beam-assisted deposition texturing of MgO
Journal of Materials Research, vol. 19, no. 2, pp. 501-504
2004
DOI: 10.1557/jmr.2004.19.2.501
Abstract anzeigen
The effect of process conditions on the biaxial texture of MgO films grown by ion-beam-assisted deposition (IBAD) was studied. The texture showed a strong dependence on the Ar+/MgO flux ratio, but a weak dependence on the divergence of Ar+ beam. One hundred-nanometer-thick epi-MgO on less than 10-nm-thick textured IBAD-MgO films that were grown on 7-nm-thick Y2O3 layers on fused silica, metal alloy tape, and polished Si substrates showed biaxial texture with in- and out-of-plane orientation distributions of less than 4° and 2°, respectively. These results strengthen the notion that the IBAD technique could serve as a universal technological process to integrate amorphous and polycrystalline substrates with various oxide and semiconductor films that need to be grown with good biaxial texture.
NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Europan Campus Rottal-InnZeitschriftenartikel
B. Gibbons, Alp Findikoglu, Sascha Kreiskott, L. Bronisz, Peterson, D., V. Matias
Accelerated coated conductor program at Los Alamos national laboratory
IEEE Transactions on Appiled Superconductivity, vol. 13, no. 2, pp. 2488-2491
2003
DOI: 10.1109/TASC.2003.811828
Abstract anzeigen
In order to accelerate research and development of coated conductors (CC), a new facility has been developed at Los Alamos National Laboratory (LANL) with labs dedicated to scaled-up fabrication and characterization of CC. These laboratories include facilities for metal tape preparation, ion-beam assisted deposition (IBAD) of template layers, superconductor deposition by laser ablation (PLD), as well as materials characterization including low-temperature transport measurements. The work builds on the prior successes of the LANL CC program, such as the benchmark results of critical currents over 300 A on 1-cm-wide short samples deposited via IBAD and PLD. The new labs have recently been completed and include the ability for reel-to-reel tape processing and characterization. Fabrication of long lengths of tape (>10 m) allow for high-throughput experimentation by linear combinatorial design. This facility is also made to enable collaboration with industrial and other partners.
NachhaltigF: Angewandte Naturwissenschaften und WirtschaftsingenieurwesenF: Europan Campus Rottal-InnZeitschriftenartikel
Sascha Kreiskott, P. Arendt, L. Bronisz, S. Foltyn, V. Matias
Continuous electropolishing of Hastelloy substrates for ion-beam assisted deposition of MgO
Superconductor Science and Technology, vol. 16, no. 5, pp. 613-616
2003
DOI: 10.1088/0953-2048/16/5/312
Abstract anzeigen
We demonstrate the applicability of continuous electropolishing for the preparation of metal tapes for ion-beam assisted deposition of MgO for the fabrication of in-plane textured template layers. These templates are used for the fabrication of second generation high temperature superconducting wires utilizing YBa2Cu3O7−δ coatings on metallic substrates. Surface roughness values below 1 nm and local slopes of less than 1° could be achieved with the electropolishing process. Mean surface roughness values are lower with the use of electropolishing and slopes of surface roughness inclines are significantly reduced compared to the best results of mechanical polishing (3.5 nm and 5°, respectively). The cost-effective process of electropolishing shows great promise for the fabrication of second generation high temperature superconducting wire.
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