Figure 2. Evidence for magnetoresistance oscillations and Josephson-like vortex in action.

(a) Modulation of critical current as a function of magnetic field, I_c(B), recorded at T = 4.25 K (solid circles). The I_c(B) of the reference sample (solid line) is also shown for comparison. (b) V(I) curves recorded for several values of applied magnetic field. The inset shows a magnification of the curves recorded at magnetic fields corresponding to the first minimum and first relative maximum of the I_c(B) pattern shown in panel (a). (c) Voltage versus magnetic field, V(B), curves recorded for several values of fixed bias current I.