Properties of YBaCuO nanobridges and dc-SQUIDs

Maxim V. Pedyash, David H.A. Blank, Jeroen H. de Muijnck, Horst Rogalla

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YBaCuO nanobridges and inductively shunted dc-SQUIDs have been patterned by direct Focused Ion Beam milling. Nanobridges manifest true Josephson effect, which can be explained by coherent motion of Abrikosov vortices in the bridge. An enhancement of this effect is proposed to be due to local suppression of the superconducting properties within the nanobridge area. This leads to a transition from SNS to SS'S type behavior of the nanobridge with decreasing temperature. Temperature dependence of the critical current, dynamic resistance, and SQUID voltage-flux modulation is discussed. The flux noise level of the nanoSQUID is measured to be about 6.5 μΦ0/√Hz at 62.7 K.
Original languageEnglish
Pages (from-to)2764-2767
Number of pages4
JournalIEEE transactions on applied superconductivity
Issue number2
Publication statusPublished - 1997
Event1996 Applied Superconductivity Conference, ASC 1996 - David L. Lawrence Convention Center, Pittsburgh, United States
Duration: 25 Aug 199630 Aug 1996

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