Microscopic Analysis of Low-Frequency Flux Noise in YBa${}_2$Cu${}_3$O${}_7$ Direct Current Superconducting Quantum Interference Devices

D. Doenitz, R. Straub, R. Kleiner +1

We use low-temperature scanning electron microscopy combined with SQUID detection of magnetic flux to image vortices and to investigate low-frequency flux noise in YBa${}_2$Cu${}_3$O$_…