Investigation of all niobium nano-SQUIDs based on sub-micrometer cross-type Josephson junctions
Investigation of all niobium nano-SQUIDs based on sub-micrometer cross-type Josephson junctions
We report on the development of highly sensitive SQUIDs featuring sub-micrometer loop dimensions. The integration of high quality and low capacitance SIS Nb/AlOx/Nb cross-type Josephson tunnel junctions results in white flux noise levels as low as 66 nΦ0 Hz−1/2, well below state-of-the-art values of their Nb-based counterparts based on constriction …