Fig. 1
From: Local Josephson vortex generation and manipulation with a Magnetic Force Microscope
Design and electronic characteristics of the studied SNS device. a experimental setup: 100-nm-thick Nb leads (in blue) are patterned on a 50-nm-thick Cu layer (in orange); the leads are bonded for transport measurements. The ellipse marks the junction region 2500 nm × 200 nm. The MFM cantilever with a Co/Cr-coated tip oscillates, excited by a dither; an optical fiber is used for the oscillation readout; b “Fraunhofer pattern” of the device: the voltage drop across the junction is measured as a function of applied current and external magnetic field (the MFM tip is retracted far away from the device). Red (blue): positive (negative) voltage drop; white: zero-voltage drop representing the superconducting state
