Chapter

Upper critical field

Richard A Klemm

in Layered Superconductors

Published in print December 2011 | ISBN: 9780199593316
Published online May 2012 | e-ISBN: 9780191738128 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199593316.003.0007

Series: International Series of Monographs on Physics

Upper critical field

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The Upper Critical Field chapter describes the calculations of the highest applied magnetic field for which a layered superconductor can remain superconducting, using the anisotropic Ginzburg-Landau and Lawrence-Doniach models. It also provides some results from the microscopic Klemm-Luther-Beasley theory, including Pauli pair-breaking and spin-orbit scattering effects, detailing explicit predictions of dimensional-crossover effects. There have been measurements of the upper critical fields parallel and perpendicular to the layers in nearly every layered superconductor, and this chapter illustrates the range of behaviours that have been observed in all classes of layered superconductors. Experimental verifications of dimensional crossover for the parallel upper critical field predicted by the Klemm-Luther-Beasley theory and of the Takahashi-Tachiki multilayer crossover effect are provided. Many detailed fits of experiments to theory are provided.

Keywords: Anisotropic Ginzburg-Landau; Lawrence-Doniach; Klemm-Luther-Beasley; Takahashi-Tachiki; upper critical field measurements; dimensional crossover; layered; superconductor

Chapter.  38502 words.  Illustrated.

Subjects: Condensed Matter Physics

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