Instabilités dynamiques et hystérésis des transitions résistives dans les supraconducteurs de type II à l'état mixte

Peltier, François; Baixeras, J.

doi:10.1051/jphys:0197300340106700

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…The existence of two "knees" in this curve suggests the presence of two phases with different values of the Ginzburg-Landau parameter K. Further evidence for the presence of precipitates is found in instabilities we observe in the FF V-I characteristics at voltage levels above several hundred microvolts, as previously reported in Ref. 9.…”

Section: Initial Statesupporting

confidence: 73%

Hysteresis in the flux flow characteristics of a type II superconductor associated with the presence of normal metal precipitates

Habbal

Joiner

1978

J Low Temp Phys

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Unusual history-dependent flux flow properties are observed in a Pbo.871Sno.129 alloy as tin precipitates from solution at room temperature. We find that the critical currents and flux flow curves depend upon the field history, the current history, and the orientational history of the sample. Two volume pinning force curves are observed with different force magnitudes and field locations of the force peak, depending upon whether the field is cycled to high fields or zero field before the force is measured. Flux flow noise measurements in these samples yield very low noise, consistent with our recent model, which predicts low noise in samples with closely spaced pinning centers that interrupt the flux motion. The experimental results are explained in terms of the formation of a nonequilibrium flux line lattice in the presence of precipitates, and the response of such a lattice to current, field, and orientational changes.

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Section: Initial Statesupporting

confidence: 73%