Microwave effects on YBa2Cu3Oy Josephson junctions with step-edge, bi-epitaxial, and sandwich geometries

Abstract

Fabrication and characterization of YBa2Cu3Oy Josephson junctions with step-edge, bi-epitaxial, and sandwich geometries are performed in this study to investigate the effects of microwave irradiation on the I–V characteristics. I–V curves under microwave irradiation reveal Shapiro steps. The width of the constant voltage steps were modulated by the microwave power. The period of the magnetic induction ΔB detected from the V–Φ curves for superconducting quantum interference devices is temperature dependent. Additionally, Tc and Ic of the proximity sandwich junctions are enhanced by the microwave irradiation.

Temperature dependent characteristics of step-edge YBCO SQUIDs

“…Due to their great potential in applications, the characteristics of high-T¢ SQUIDs have received increasing studies [1][2][3][4][5][6]. Most reports have focused on optimization of the SQUIDs and some significant results were obtained [1,2,6]. However, research on the temperature effects on the SQUID characteristics are still rare.…”