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Vortex Fluctuations...
Vortex Fluctuations in High-Tc Films : Flux Noise Spectrum and Complex Impedance
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- Festin, Örjan (författare)
- Uppsala universitet,Institutionen för materialvetenskap
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- Svedlindh, Peter (författare)
- Uppsala universitet,Institutionen för materialvetenskap
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Kim, Beom Jun (författare)
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Minnhagen, Petter (författare)
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Chakalov, Radoslav (författare)
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Ivanov, Zdravko (författare)
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(creator_code:org_t)
- 1999
- 1999
- Engelska.
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 83:26, s. 5567-5570
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The flux noise spectrum and complex impedance for a 500 Å thick YBCO film are measured and comparedwith predictions for two-dimensional vortex fluctuations. It is verified that the complex impedanceand the flux noise spectra are proportional to each other, that the logarithm of the flux noise spectrafor different temperatures has a common tangent with slope 21, and that the amplitude of the noisedecreases as d23, where d is the height above the film at which the magnetic flux is measured. Acrossover from normal to anomalous vortex diffusion is indicated by the measurements and is discussedin terms of a two-dimensional decoupling.
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