Vortex imaging in amorphous Mo80Ge20 pentagons

Mechanical Control of Individual Superconducting Vortices

“…Evidence of vortex motion in contact mode SQUID experiments was previously noticed in weakly pinned materials and was not further investigated. 22,23 In order to eliminate any magnetic influence from the SQUID, we verified that our results were independent of whether current was flowing in the SQUID and confirmed the same influence of contact on vortices when we contacted the sample at a temperature at which the Nb SQUID was not force microscopy of the area that was scanned in contact (top) and a different area that was not scanned in contact (bottom). We detected no differences in topography or damage to the film.…”

“…Vortex displacement due to local contact was observed in two samples of Nb and nine samples of NbN and confirmed for thousands of individual, well-separated vortices (Figures and ). Evidence of vortex motion in contact mode SQUID experiments was previously noticed in weakly pinned materials and was not further investigated. , …”

“…Evidence of vortex motion in contact mode SQUID experiments was previously noticed in weakly pinned materials and was not further investigated. 22 , 23 …”

Confined vortices in de facto mesoscopic Mo80Ge20 disks with sector defects

“…According to Baelus et al [17], the vortices interact with the tip of defect and are rotated by π/2 to make metastable states such that they lie along the circumference perpendicular to the defect. As noted by Ho et al [24] and Kokubo et al [2], the circular plate has a single rotational degree of freedom in the vortex configuration. In contrast, a perfect disk has infinite degrees of freedom in rotational symmetry.…”

Observation of local magnetic distribution in ramp-edge Josephson junctions

“…It is very important to understand the local flux behavior in the vicinity of the junctions because the flux quantum is considered as an information unit in the SFQ circuit and also important for understanding the relation between the Josephson current and external magnetic field in high-T c d-wave superconductors. Observations of spatial magnetic distributions and the magnitude of the flux on the superconductors measured using a scanning SQUID microscope (SSM) have provided substantial information on various problems such as the clarification of d-wave superconductivity and its fundamental properties of high T c cuprates [3,[10][11][12][13][14], evaluation of the super current distribution of the strip lines [15], observation of the interlayer vortex of high T c cuprates [16], and flux quanta on the various shapes of thin films [17,18]. We have investigated local magnetic distributions of the artificial bicrystal and tricrystal grain boundary junctions using an SSM, which confirmed the d-wave pairing symmetry of high-T c cuprates [11,19].…”