Enhanced mode detection for microwaves using a high-impedance YBCO-BiO composite superconductor
| Autor: | Maruo Kamino, Kazuhiro Shimaoka, Takaaki Ikemachi, Shoichi Nakano, Yorinobu Yoshisato, Kazuya Niki |
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| Rok vydání: | 1994 |
| Předmět: |
Josephson effect
Superconductivity Materials science Condensed matter physics Detector Metals and Alloys Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Pi Josephson junction Responsivity Condensed Matter::Superconductivity Grain boundary Electrical and Electronic Engineering Instrumentation Electrical impedance Microwave |
| Zdroj: | Sensors and Actuators A: Physical. 43:217-222 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/0924-4247(93)00698-4 |
| Popis: | We have developed a Josephson type microwave detector using a YBCO-BiO composite superconductor which uses the non-linear effect produced by a complex network of Josephson weak links at the grain boundary (enhanced mode detection). This composite superconductor was prepared by doping YBa2Cu3Ox with Bi2O3, which causes high normal state resistance in the composite and enhances the Josephson effect at the grain boundary. It was found that the measured responsivity (RMV) improved by increasing the normal resistance (Rn) of the detector through enhanced matching of the incident microwaves and the detector. An RMV of 180 V/W and NEP of 1.4×10−14 W/Hz 1 2 were obtained with a detector having an Rn of 13 Ω. These results suggest the feasibility of a practical detector having an RMV of more than 104 V/W which operates at 60 K by the enhanced mode detection of a high-TC superconductor. |
| Databáze: | OpenAIRE |
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