Fabrication and characterization of Nb/NbxSi1−x/Nb Josephson junction arrays for voltage standard

We report in CPEM 2014 our effort towards SNS Josephson junction devices for the quantum voltage standard. SNS junction array device, with Nb as the superconductor material (S) and Nb_xSi_1-x alloy as the barrier material (N), is fabricated and tested by NIM (National Institute of Metrology). The I-V characteristic curves of the junction arrays are measured and the experimental results are discussed.