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標題: Tunable high transition temperature superconducting quantum interference device magnetometer with gate-voltage-controlled bicrystal junctions
作者: Chen, K.L.
Sou, U.C.
Chen, J.C.
Yang, H.C.
Jeng, J.T.
Ko, P.C.
Horng, H.E.
Wu, C.H.
Chen, J.H.
關鍵字: bicrystals;electric field effects;grain boundaries;high-temperature;superconductors;polymer films;SQUID magnetometers;superconducting;thin films;interface
Project: Applied Physics Letters
期刊/報告no:: Applied Physics Letters, Volume 95, Issue 3.
A gate-voltage-controlled high transition temperature direct current superconducting quantum interference device (high-T(c) dc SQUID) magnetometer was fabricated to study how the electric field effect affects the device's voltage-flux and voltage-current characteristics. The magnetometer consists of a monolithic YBa(2)Cu(3)O(7-delta) superconducting film and bicrystal junctions covered by a polymethylmethacrylate film as the gate insulator. It was found that the magnetic flux modulated voltage swing of the SQUID magnetometer varies by 48% when the gate voltage is changed from -1.9 to 9.5 V. The variation in voltage swing is attributed to the change of effective capacitance in grain-boundary junctions.
ISSN: 0003-6951
DOI: 10.1063/1.3182240
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