Low-frequency a.c. susceptibility of a superconducting Pb–Sn eutectic alloy

Rossiter, P. L.; Schafe, Lawrence Maxwell

doi:10.1080/00318087508228682

Cited by 1 publication

(1 citation statement)

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“…Directionally solidified eutectic P b S n alloys may be regarded as heterogeneous type-I1 superconductors [8,9,21 to 251 with magnetic properties that can be described in terms of flux line lattice (FLL) pinning at the lamellar boundaries between the two phases and at any Sn phase precipitates within the Pb lamellae [9]. It should be noted however that an exact and unambiguous identification of the operative pinning mechanisms in these specimens was not possible either by evaluation of the average pinning force as a function of the magnetic induction and temperature, or by careful consideration of the microstruct<ural features of the specimen.…”

Section: Discussionmentioning

confidence: 99%

Field History Effects in Superconducting PbSn Alloys

Schafe

Rossiter

Rachinger

1976

Physica Status Solidi (b)

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Field history effects in directionally solidified eutectic Pb-Sn alloy specimens are defined and analyzed in terms of the dependence of the flux trapped (at zero applied magnetic field) and the decreasing applied magnetic field minor magnetization paths on magnetic history. The temperature and sweep rate dependence of these effects and the direct measurement of flux profiles along minor magnetization paths may be explained in terms of the hypothesis that the effective pinning force in these specimens depends not only on the nature of the pinning features but also on the density, density distribution, and mobility of defects in the flux line lattice.Feld-Vorbehandlungs-Effekte in gerichtet verfestigten, eutektischen Pb-Sn-Legierungsproben werden definiert und mit der Abhingigkeit der festgesetzten FluBwirbel (bei angelegtem magnetischen Null-Feld) und der kleineren Magnetisierungswege bei abnehmendem magnetischen Feld von der magnetischen Vorbehandlung erkliirt. Die Temperatur-und Geschwindigkeitsabhingigkeit dieser Effekte und die direkte Messung der FluBprofile entlang der kleineren Magnetisierungswege lassen sich mit der Annahme erkliiren, daB die wirksame Anhaftkraft in diesen Proben nicht nur von der Art des Verankerungsmechanismus, sondern auch von der Dichte, der Dichteverteilung und der Beweglichkeit der Defekte im FluBliniengitter abhiingt.

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Section: Discussionmentioning

confidence: 99%