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Telegraph-like noise in Y-Ba-Cu oxide thin-film dc SQUID's

Journal Article · · Appl. Phys. Lett.; (United States)
DOI:https://doi.org/10.1063/1.100637· OSTI ID:7030176
We have observed a telegraph-like noise in dc superconducting quantum interference devices (SQUID's) made of low-temperature synthesized superconducting Y-Ba-Cu oxide thin films. The voltage of the SQUID jumps among two to four discrete levels randomly with time, and exhibits a Lorentzian type frequency dependence in the power spectrum. Periodic modulations of the voltage with magnetic flux are observed in a SQUID having narrow bridges of submicrometer width. The flux noise of the SQUID is dominated by the telegraph-like noise at low frequencies.
Research Organization:
Research Institute of Applied Electricity, Hokkaido University, Sapporo 060, Japan
OSTI ID:
7030176
Journal Information:
Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 53:7; ISSN APPLA
Country of Publication:
United States
Language:
English