We have demonstrated proximity effect coupling between a high transistion temperature superconductor and a normal metal. In a device with a 1 µ long gap in a YBa2Cu307 film spanned by a Au shunt we have observed a de supercurrent and the ac Josephson effect under microwave irradiation from 2GHz to 15GHz. Preliminary work has also begun with Ag shunts. These high quality S-N interfaces should be applicable both to probing the superconducting state in oxide superconductors and to building high Tc electronic devices.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering