D. Munter et al., Fluxon pinning through interaction with the superconducting wiring of longannular Josephson junctions, PHYS REV B, 58(21), 1998, pp. 14518-14523
The statics and dynamics of magnetic-flux quanta (fluxons) in long annular
Josephson tunnel junctions have been investigated. Pinning by interaction o
f the fluxon field outside the junction with the superconducting wiring has
been observed in spatially resolving measurements using low-temperature sc
anning electron microscopy. We were able to influence the characteristics o
f this field by carefully modifying the beam-induced fluxon trapping proced
ure. In this way we were able to select the pinning site acting on the flux
on. [S0163-1829(98)04145-9].