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Titolo:
MAGNETIC-FLUX NOISE IN NB THIN-FILM
Autore:
CHUN SH; SONG W; KOH GH; KIM HC; KHIM ZG;
Indirizzi:
SEOUL NATL UNIV,DEPT PHYS SEOUL 151742 SOUTH KOREA
Titolo Testata:
Physica. C, Superconductivity
, volume: 282, anno: 1997,
parte:, 4
pagine: 2335 - 2336
SICI:
0921-4534(1997)282:<2335:MNINT>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPERCONDUCTORS; FLOW;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
3
Recensione:
Indirizzi per estratti:
Citazione:
S.H. Chun et al., "MAGNETIC-FLUX NOISE IN NB THIN-FILM", Physica. C, Superconductivity, 282, 1997, pp. 2335-2336

Abstract

We measured the flux flow noise in a type-II superconductor by a direct flux detection method. The fluctuating component of flux changes inthe central part of niobium thin film sample is monitored by a Nb rf-SQUID as a function of the transport current and magnetic field. The flux noise power spectrum showed either 1/f or a Lorentzian behavior depending on the size of transport current. The overall magnitude of theflux noise showed a peak near the critical current, whereas the voltage increases monotonically. Based on a modified shot-noise model, we simulated both Lorentzian and 1/f noise spectra with appropriate assumptions and found that the characteristic frequency of noise spectrum isrelated to the vortex transit time.

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Documento generato il 14/07/20 alle ore 06:22:49