Properties of all YBa2Cu3O7 Josephson edge junctions prepared by in situ laser ablation deposition
- 11 February 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 58 (6), 634-636
- https://doi.org/10.1063/1.104552
Abstract
Thin‐film YBa2Cu3O7‐YBa2Cu3O7 edge junctions of 0.4×10 μm2 cross section were prepared in situ by a multistep laser ablation deposition process. The fabrication time was about 3 h and the yield of good devices was 50%. Typical junctions reached zero resistance at 72 K and had a critical current density Jc of 300 A/cm2 at 70 K. Their Jc as a function of temperature increased slowly with decreasing temperature down to 65 K and much faster below it. In the region of low Jc we observed suppression of the critical current by a magnetic field. Under microwave radiation clear Shapiro steps were observed whose magnitude versus the microwave field agreed qualitatively with the resistively shunted junction model of a current biased junction.Keywords
This publication has 15 references indexed in Scilit:
- YBaCuO input coils with low T c and high T c SQUIDsApplied Physics Letters, 1990
- High-frequency flux flow in Y-Ba-Cu-O/Ag/Y-Ba-Cu-O thin-film superconducting-normal-superconducting junctionsPhysical Review B, 1990
- Josephson weak links in thin films of YBa2Cu3O7−x induced by electrical pulsesApplied Physics Letters, 1990
- Laser wavelength dependent properties of YBa2Cu3O7−δ thin films deposited by laser ablationApplied Physics Letters, 1989
- Bridge Type Josephson Junctions in MO-CVD Thin FilmsJapanese Journal of Applied Physics, 1989
- Greene, Krusin-Elbaum, and Malozemoff replyPhysical Review Letters, 1989
- Magnetic penetration depth ofPhysical Review Letters, 1989
- Response of YBaCuO thin-film microbridges to microwave irradiationApplied Physics Letters, 1989
- Orientation Dependence of Grain-Boundary Critical Currents inBicrystalsPhysical Review Letters, 1988
- Origin of superconductive glassy state and extrinsic critical currents in high-oxidesPhysical Review Letters, 1987