Random telegraph noise spectra in granular high-Tc films

V. D. Ashkenazy; M. Bonaldi; G. Jung; I. B. Khalfin; B. Ya Shapiro; S. Vitale

doi:10.1016/0038-1098(94)90241-0

Random telegraph noise spectra in granular high-T_c films

V. D. Ashkenazy, M. Bonaldi, G. Jung, I. B. Khalfin, B. Ya Shapiro, S. Vitale

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Random telegraph noise voltages developing across current biased granular high-T_c films interact with the system of Abrikosov vortices pinned inside the grains through random Lorentz forces caused by the flow of random currents in the film. Viscous relaxation of vortices opposes random forces and leads to the attenuation of the low frequency part of the observed spectra of the voltage noise. The theoretical model has been created and discussed. The predictions of the model have been verified experimentally by observations of a peak in the random noise spectra recorded for granular YBaCuO thin film strips immersed in a weak magnetic field and biased with a dc current flow above the critical current. It has been found that the peak position and its changes with charging random telegraph switching rate are in a good agreement with the theoretical predictions.

Original language	English
Pages (from-to)	779-782
Number of pages	4
Journal	Solid State Communications
Volume	90
Issue number	12
DOIs	https://doi.org/10.1016/0038-1098(94)90241-0
State	Published - 1 Jan 1994

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(94)90241-0

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title = "Random telegraph noise spectra in granular high-Tc films",

abstract = "Random telegraph noise voltages developing across current biased granular high-Tc films interact with the system of Abrikosov vortices pinned inside the grains through random Lorentz forces caused by the flow of random currents in the film. Viscous relaxation of vortices opposes random forces and leads to the attenuation of the low frequency part of the observed spectra of the voltage noise. The theoretical model has been created and discussed. The predictions of the model have been verified experimentally by observations of a peak in the random noise spectra recorded for granular YBaCuO thin film strips immersed in a weak magnetic field and biased with a dc current flow above the critical current. It has been found that the peak position and its changes with charging random telegraph switching rate are in a good agreement with the theoretical predictions.",

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T1 - Random telegraph noise spectra in granular high-Tc films

AU - Ashkenazy, V. D.

AU - Bonaldi, M.

AU - Jung, G.

AU - Khalfin, I. B.

AU - Shapiro, B. Ya

AU - Vitale, S.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - Random telegraph noise voltages developing across current biased granular high-Tc films interact with the system of Abrikosov vortices pinned inside the grains through random Lorentz forces caused by the flow of random currents in the film. Viscous relaxation of vortices opposes random forces and leads to the attenuation of the low frequency part of the observed spectra of the voltage noise. The theoretical model has been created and discussed. The predictions of the model have been verified experimentally by observations of a peak in the random noise spectra recorded for granular YBaCuO thin film strips immersed in a weak magnetic field and biased with a dc current flow above the critical current. It has been found that the peak position and its changes with charging random telegraph switching rate are in a good agreement with the theoretical predictions.

AB - Random telegraph noise voltages developing across current biased granular high-Tc films interact with the system of Abrikosov vortices pinned inside the grains through random Lorentz forces caused by the flow of random currents in the film. Viscous relaxation of vortices opposes random forces and leads to the attenuation of the low frequency part of the observed spectra of the voltage noise. The theoretical model has been created and discussed. The predictions of the model have been verified experimentally by observations of a peak in the random noise spectra recorded for granular YBaCuO thin film strips immersed in a weak magnetic field and biased with a dc current flow above the critical current. It has been found that the peak position and its changes with charging random telegraph switching rate are in a good agreement with the theoretical predictions.

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Random telegraph noise spectra in granular high-T_c films

Abstract

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