Microwave response of a powdered high-temperature superconductor ceramic
Abstract
Experiments were carried out on powdered specimens of YBa2Cu3O(7-x) ceramic (Tc = 92 K) to investigate the response of the ceramic to amplitude-modulated signals in the 3-cm wavelength region. The bias voltage and the volt-ampere characteristics were recorded by the standard four-contact method. At low bias voltages, the response peak corresponds to the optimum bias voltage for intergranular Josephson junctions. This peak is observed only in the case of sufficiently good mechanical contact between the grains. At high bias voltages, the presence of a diffuse microwave response is attributed to detection within the grains.
- Publication:
-
Pisma v Zhurnal Tekhnischeskoi Fiziki
- Pub Date:
- April 1991
- Bibcode:
- 1991PZhTF..17...37R
- Keywords:
-
- Ceramics;
- Grain Boundaries;
- High Temperature Superconductors;
- Microwave Frequencies;
- Powder (Particles);
- Volt-Ampere Characteristics;
- Electromagnetic Radiation;
- Josephson Junctions;
- Electronics and Electrical Engineering