منابع مشابه
Flux creep and flux jumping.
The flux jump instability of Bean’s critical state in the flux-creep regime of type-II superconductors is considered. We find the flux-jump field B j which determines stability criterion of the superconducting state. The dependence of B j on the external magnetic-field ramp rate Ḃe is calculated. We demonstrate that under the conditions typical for most of the magnetization experiments the slop...
متن کاملFlux jumping in thin films.
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 B j at which this instability occurs and its dependence on the ramp rate Ḃa , on the nonlinear current-voltage curve, and on the thermal resistance between the film an...
متن کاملDiamagnetism and flux creep in bilayer exciton superfluids
We discuss the diamagnetism induced in an isolated quantum Hall bilayer with total filling factor νT = 1 by an in-plane magnetic field. This is a signature of counterflow superfluidity in these systems. We calculate magnetically induced currents in the presence of pinned vortices nucleated by charge disorder, and we predict a history-dependent diamagnetism that could persist on laboratory time ...
متن کاملFlux Creep in the Quasi-1D Superconducting Carbide Sc3CoC4
The superconducting flux dynamic of the transition metal carbide Sc3CoC4 which exhibits a quasi-one-dimensional structure is studied. Besides zero-field-cooling (zfc), field-cooling (fc) and magnetization measurements, especially flux creep relaxation experiments are performed. The relaxation rates S = dM/dlnt are determined at selected temperatures below the transition temperature Tc in two ma...
متن کاملDynamics of flux creep in underdoped single crystals of Y12xPrxBa2Cu3O72d
Transport as well as magnetic relaxation properties of the mixed state were studied on strongly underdoped Y12xPrxBa2Cu3O72d crystals. We observed two correlated phenomena—a coupling transition and a transition to quantum creep. The distribution of transport current below the coupling transition is highly nonuniform, which facilitates quantum creep. We speculate that in the mixed state below th...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1996
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.53.12311