Particle-size and temperature dependence of microwave noise in superconducting : Evidence for random Josephson junctions
- 1 February 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 39 (4), 2733-2735
- https://doi.org/10.1103/physrevb.39.2733
Abstract
The effects of particle size and temperature on the microwave noise and low-field microwave absorption in powders have been studied by the magnetically modulated microwave absorption technique. The results can be interpreted in terms of a network of random Josephson junctions in the individual superconducting grains but are not consistent with the thermally activated flux creep model. An estimate of the size of the Josephson junctions is also obtained from the variation of the microwave noise with particle size.
Keywords
This publication has 17 references indexed in Scilit:
- Giant Flux Creep and Irreversibility in an Y-Ba-Cu-O Crystal: An Alternative to the Superconducting-Glass ModelPhysical Review Letters, 1988
- Microwave observation of magnetic field penetration of high-superconducting oxidesPhysical Review B, 1987
- Low-field microwave absorption in the superconducting copper oxidesPhysical Review B, 1987
- Possible Josephson oscillations spectra and electron paramagnetic resonance ofin Y-Ba-Cu-OPhysical Review B, 1987
- Origin of superconductive glassy state and extrinsic critical currents in high-oxidesPhysical Review Letters, 1987
- Vortex Creep in the Superconducting Oxide La
2-
x
Sr
x
CuO 4Europhysics Letters, 1987
- Flux trapping and superconductive glass state in:BaPhysical Review Letters, 1987
- Spin-Glass State of a Randomly Diluted Granular SuperconductorPhysical Review Letters, 1985
- Diamagnetic susceptibility of superconducting clusters: Spin-glass behaviorPhysical Review B, 1985
- Theory of Flux Creep in Hard SuperconductorsPhysical Review Letters, 1962