Tunable high transition temperature superconducting quantum interference device magnetometer with gate-voltage-controlled bicrystal junctions

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 consis...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2009-07, Vol.95 (3), p.033504-033504-3
Main Authors: Chen, Kuen-Lin, Sou, U. C., Chen, J. C., Yang, H. C., Jeng, J. T., Ko, P. C., Horng, H. E., Wu, C. H., Chen, J. H.
Format: Article
Language:English
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 − δ 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
1077-3118
DOI:10.1063/1.3182240