Digitale Medien
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
80 (1996), S. 2939-2948
ISSN:
1089-7550
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
The relation between random telegraph noise and 1/f-type background voltage fluctuations in current biased high-Tc films has been investigated. The experiments have revealed that the telegraph noise in high-Tc superconducting films is due to a combined action of a macroscopic two-level fluctuator and a detector. The macroscopic telegraph signal does not constitute an elementary contribution to 1/f noise. However, the behavior of telegraph and 1/f-like voltage fluctuations have shown astonishing similarities. Telegraph voltage amplitudes and 1/f power spectrum magnitude scale linearly with changing current flow above almost identical threshold currents. The telegraph signal symmetry characteristics have been found to be linear also but with distinctively different offset currents. Analysis of the measured characteristics indicates that the telegraph and 1/f fluctuations are due to different flux fluctuators coupled to observable voltages by the same detector mechanism. © 1996 American Institute of Physics.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.363150
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