Flux pinning and peak effects in single crystalline 2H-NbSe2

✍ Scribed by P. Koorevaar; J. Aarts; P. Berghuis; P.H. Kes

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 385 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80169-5

✦ Synopsis

In this paper we present the field dependence of the flux line pinning force of very thin (d=2-l5.5 IlIn) single crystals of the anisotropic low temperature superconductor 2H-NbSe2' where the field is nOrJnal to the superconducting Nb-layers. Below BcD ~0.8 B e2 the pinning force can well be described by the two-dimensional collective pinning (CP) theory. Between BcD and Be~a peak effect is observed which we interpret as a transition from two to three-dimensional disorder in the flux line lattice. Compa.rison of the crossover conditions with the criterion set by the CP-theory reveals for the first time that the tilt rnodulus for an anisotropic superconductor is largely reduced in a way predicted by a recently obtained theoretical expression.