Superconducting weak bonds at grain boundaries in MgB{sub 2}
Journal Article
·
· Journal of Experimental and Theoretical Physics
- Russian Academy of Sciences, Institute of Crystallography (Russian Federation)
- Tokyo University of Agriculture and Technology, Department of Applied Physics (Japan)
- Chalmers University of Technology, Department of Microtechnology and Nanoscience (Sweden)
- Moscow State University, Research Institute of Nuclear Physics (Russian Federation)
The possibility of preparing bicrystalline Josephson junctions and bolometers based on superconducting MgB{sub 2} on specially prepared bicrystalline MgO substrates is investigated. Microbridges 0.85-6.00 {mu}m in width, intersecting the bicrystalline interface, are formed in epitaxial bicrystalline MgB{sub 2} films grown on these substrates. It is found that annealing of bicrystalline samples in oxygen leads to a systematic decrease in the critical current, an increase in the temperature width of the superconducting transition region, and to an improvement of the current-voltage (IV) characteristic, which becomes close in shape to the IV characteristic of a Josephson junction. The response of such a junction to radiation at a frequency of 110 GHz with an amplitude attaining 0.5 mV is measured.
- OSTI ID:
- 21075699
- Journal Information:
- Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 3 Vol. 105; ISSN JTPHES; ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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