| Zugriffsnummer | 30563 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Fabrication issues in optimising YBa2Cu3O7-x flux transformers for low 1/f noise |
| Autor(in); Institution |
Ludwig, F.; Department of Physics, University of Califomia, Berkeley, USA; Materials Science Division, Lawrence Berkeley Laboratory. Berkeley, USA
Dantsker, E.; Department of Physics, University of Califomia, Berkeley, USA; Materials Science Division, Lawrence Berkeley Laboratory. Berkeley, USA
Nemeth, D. T.; Department of Physics, University of Califomia, Berkeley, USA; Materials Science Division, Lawrence Berkeley Laboratory. Berkeley, USA
Koelle, D.; Department of Physics, University of Califomia, Berkeley, USA; Materials Science Division, Lawrence Berkeley Laboratory. Berkeley, USA
Miklich, A. H.; Department of Physics, University of Califomia, Berkeley, USA; Materials Science Division, Lawrence Berkeley Laboratory. Berkeley, USA
Clarke, John; Department of Physics, University of Califomia, Berkeley, USA; Materials Science Division, Lawrence Berkeley Laboratory. Berkeley, USA
Knappe, Silvia; 9.33, Kryoelektronik, PTB-Berlin
Koch, Hans; 9.33, Kryoelektronik, PTB-Berlin
Thomson, R.; National Institute of Standards and Technology, Boulder, USA
|
| Quelle/Jahr | Superconductor Science and Technology: 7 (1994), 5, 273 - 276 |
| ISSN | 0953-2048 (PRINT) ; 1361-6668 (ONLINE) |
| DOI | |
| Verlag | Bristol: IOP Publ. |
| Zusammenfassung | We describe an improved interconnect technology for the fabrication of multiturn flux transformers from YBa2Cu3O7-x-SrTiO3-YBa2Cu3O7-x multilayers. The essential improvements are reductions in the thicknesses of the trilayer films, typically to 100 nm, 250 nm and 250 nm respectively, and in the deposition rate, to 0.07 nm/laser pulse. This process yields crossovers in which the critical current density in the upper YBa2Cu3O7-x film at 77 K is (2-3)*106 cm-2 In situ trilayers exhibited 1/f flux noise levels at 1 Hz below the measurement sensitivity of 15 mu Phi 0 Hz-1/2, Where Phi 0 is the flux quantum. However the flux noise of trilayers in which each layer had been patterned was significantly higher. The best flip-chip magnetometer had a white noise of 40 fT Hz-1/2, increasing to 340 fT Hz-1/2 at 1 Hz; the corresponding flux noise levels were 9 mu Phi 0 Hz-1/2 and 75 mu Phi 0 Hz-1/2. |
Zitierung
Ludwig, F., Dantsker, E., Nemeth, D. T., Koelle, D., Miklich, A. H., Clarke, J., Knappe, S., Koch, H., & Thomson, R. (1994). Fabrication issues in optimising YBa₂Cu₃O7-x flux transformers for low 1/f noise. Superconductor Science and Technology, 7(5), 273–276. https://doi.org/10.1088/0953-2048/7/5/011