TY - JOUR
T1 - Flux jumping in thin films
AU - Mints, R.
AU - Brandt, E.
PY - 1996
Y1 - 1996
N2 - The thermomagnetic flux-jump instability of the Bean critical state is considered, which may occur during flux penetration in thin films of type-II superconductors in a perpendicular magnetic field. We calculate the applied field (Formula presented) at which this instability occurs and its dependence on the ramp rate (Formula presented), on the nonlinear current-voltage curve, and on the thermal resistance between the film and the substrate. As examples we consider the thermomagnetic flux-jump instability at the straight edge of a superconducting film and of the same edge containing a small indentation of semicircular shape. The presence of a small indentation drastically reduces the field or ramp rate at which the thermomagnetic instability occurs.
AB - The thermomagnetic flux-jump instability of the Bean critical state is considered, which may occur during flux penetration in thin films of type-II superconductors in a perpendicular magnetic field. We calculate the applied field (Formula presented) at which this instability occurs and its dependence on the ramp rate (Formula presented), on the nonlinear current-voltage curve, and on the thermal resistance between the film and the substrate. As examples we consider the thermomagnetic flux-jump instability at the straight edge of a superconducting film and of the same edge containing a small indentation of semicircular shape. The presence of a small indentation drastically reduces the field or ramp rate at which the thermomagnetic instability occurs.
UR - http://www.scopus.com/inward/record.url?scp=0009264127&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.54.12421
DO - 10.1103/PhysRevB.54.12421
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AN - SCOPUS:0009264127
SN - 1098-0121
VL - 54
SP - 12421
EP - 12426
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 17
ER -