Investigation of voltage steps of U(I) curves in PbMo6S8 wires

Article Article scientifique Article Investigation of voltage steps of U(I) curves in PbMo6S8 wires eng 1992 author Herrmann Peter Friedrich 23045 author Schellenberg Lukas Nathan 31267 author Zuccone J. author Seeber Bernd 26343 author Fischer Oystein 25258 author Grill R. author Perenboom J.A.A.J. 61-68 10.1016/0921-4534(92)90296-O 0921-4534 http://linkinghub.elsevier.com/retrieve/pii/092145349290296O We have investigated hot-drawn PbMo6S8 composite monofilament wires (Jc = 4.6x108A/m2atμ0H = 10 TandT = 4.2 K) in particular steps that occur in the I-U transition curves. These steps have been measured in fields up to 9 T and in a temperature range between 2 K and 10 K. We have analyzed them by considering two models, the hot spot model and the phase-slip model. Furthermore, a flux flow channel picture is developed, where the step is related to an avalanche of flux flow localised in a narrow channel. The observed field dependence of the step in a field applied transversally to the wire can be understood within this description. All these model considerations concur; the origin of the steps appears to lie in local defects with a μm length-scale. Just a few of these defects may already depress the overall critical current in a substantial way. Taking into account this situation, there exists an important potential for further improvements of the critical current in PbMo6S8 wires. Dewey 500.2 33 Département de physique de la matière quantique 131 35 Groupe de physique appliquée 135 false Physica C: Superconductivity and Its Applications 202 1-2 2e8e64b2-91fa-4834-96a1-d16ca53586ff Article (Published version) Restricted Scan_UNIGE_1128_001.pdf 4932550 application/pdf restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique Faculté des sciences / Section de physique / Groupe de physique appliquée

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Investigation of voltage steps of U(I) curves in PbMo₆S₈ wires	Physica C: Superconductivity and Its Applications			1992	440	0

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Herrmann, Peter Friedrich