Granular superconducting quantum interference device and apparatus including same

摘要

Superconducting quantum interference devices (SQUID's) are described including two superconductor pathways connected together by a narrow bridge of a granular superconductor material having a high normal state electrical resistivity of about 10<->4 to 10<->2 ohm-cm. The latter material is preferably a granular superconductor including superconductor grains having a low normal state electrical resistivity embedded in a matrix of a material having a high normal state electrical resistivity.