| Zugriffsnummer | 31489 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | A planar YBa2Cu3O7 gradiometer at 77 K |
| Autor(in); Institution |
Knappe, Silvia; 9.33, Kryoelektronik, PTB-Berlin
Drung, Dietmar; 9.33, Kryoelektronik, PTB-Berlin
Schurig, Thomas; 9.33, Kryoelektronik, PTB-Berlin
Koch, Hans; 9.33, Kryoelektronik, PTB-Berlin
Klinger, M.; Forschungsgesellschaft für Informationstechnik mbH, Bad Salzdetfurth, GERMANY
Hinken, J.; Forschungsgesellschaft für Informationstechnik mbH, Bad Salzdetfurth, GERMANY
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| Quelle/Jahr | Cryogenics: 32 (1992), 10, 881 - 884 |
| ISSN | 0011-2275 (PRINT) ; 1879-2235 (ONLINE) |
| DOI | |
| Verlag | Amsterdam: Elsevier |
| Freie Schlagworte | YBCO ; gradiometers ; SQUIDs |
| Zusammenfassung | We describe the fabrication and performance of a single-layer YBa2Cu3O7 (YBCO) d.c. SQUID in a first-order gradiometer configuration. The junctions are of the step-edge type. The edge formation in the MgO substrate and all patterning were performed by Ar-plasma etching utilizing standard photoresist masks, thus involving more common and simpler fabrication techniques than reported by other groups. The gradiometer consists of two 1.2 mm2 pick-up coils with a baseline of 1.7 mm coupled directly to a 90 × 90 μm2 SQUID loop. At 77 K a total white noise of 185 μΠ0 Hz ˜ 1/2 and a 1/ƒ corner of about 10 Hz have been measured. This corresponds to an intrinsic flux noise level of about 70 μΦ0 Hz ˜ 1/2, an energy sensitivity of 6.3 × 10−29 J Hz−1 and a gradient noise level of 2.2 nT m−1 Hz ˜ 1/2. |
