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Scaling Behavior of Quasi-One-Dimensional Vortex Avalanches in Superconducting Films
A J Qviller1, T Qureishy2, Y Xu3,4
1nSolution AS, Maries gt. 6, 0368, Oslo, Norway. atlejq@gmail.com.
Dynamically driven vortex avalanches in superconducting films exhibit power-law size distributions and finite-size scaling. These findings experimentally validate theoretical models of self-organized criticality in superconductors.
Area of Science:
- Condensed Matter Physics
- Superconductivity
- Materials Science
Background:
- Vortex avalanches are critical phenomena in superconductors.
- Understanding their scaling behavior is key to comprehending flux dynamics.
Purpose of the Study:
- To investigate the scaling behavior of dynamically driven vortex avalanches.
- To experimentally verify theoretical models of self-organized criticality in superconducting films.
Main Methods:
- Quantitative magneto-optical imaging of vortex avalanches.
- Characterization of probability distributions of avalanche size.
- Analysis of finite-size scaling effects.
Main Results:
- Observed power-law distributions for avalanche sizes over three decades.
- Identified avalanche size exponents between 1.0 and 1.4.
- Demonstrated finite-size scaling dependent on flux penetration depth.
Conclusions:
- Experimental evidence supports self-organized criticality in superconducting vortex avalanches.
- The study confirms a theoretical scaling relation between avalanche size exponent and fractal dimension.
- Findings advance the understanding of critical phenomena in YBa2Cu3O7-δ films.
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