TY - JOUR
T1 - Direct imaging of vortex polygons and vortex shells in mesoscopic squares of a weak pinning superconducting thin film
AU - Kokubo, Nobuhito
AU - Okayasu, Satoru
AU - Nojima, Tsutomu
AU - Tamochi, Hirotaka
AU - Shinozaki, Bunju
N1 - Publisher Copyright:
© 2014 The Physical Society of Japan.
PY - 2014/8/15
Y1 - 2014/8/15
N2 - We report on the direct visualization of vortices in mesoscopic squares of a weak pinning amorphous superconducting thin film using a scanning superconducting quantum interference device microscope. From systematic measurements made on selected dots, we trace how the vortex pattern evolves with an applied magnetic fi eld. The observed images clearly illustrate the formation of symmetric polygons and concentric shells of vortices, from which the rule of shell filling with increasing vorticity is formulated. We analyze the size and shape of vortex polygons and obtain insight into the flow pattern of the shielding current governing vortex configurations.
AB - We report on the direct visualization of vortices in mesoscopic squares of a weak pinning amorphous superconducting thin film using a scanning superconducting quantum interference device microscope. From systematic measurements made on selected dots, we trace how the vortex pattern evolves with an applied magnetic fi eld. The observed images clearly illustrate the formation of symmetric polygons and concentric shells of vortices, from which the rule of shell filling with increasing vorticity is formulated. We analyze the size and shape of vortex polygons and obtain insight into the flow pattern of the shielding current governing vortex configurations.
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U2 - 10.7566/JPSJ.83.083704
DO - 10.7566/JPSJ.83.083704
M3 - Article
AN - SCOPUS:84924872942
VL - 83
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 8
M1 - 083704
ER -