Transition between layered and filamentary types of anisotropy in layered superconducting structures

✍ Scribed by D. A. Kuptsov

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 375 KB
• Volume: 504
• Category: Article
• ISSN: 0003-3804
• DOI: 10.1002/andp.19925040408

✦ Synopsis

A model of layered superconducting structure consisting of alternating anisotropic superconducting layers S, and S, with different transition temperatures is considered. It is shown that due to competition between two origins of anisotropyeffective-mass anisotropy of individual layers and proximity-induced anisotropy the effective anisotropy of the whole system signficiantly varies temperature. The components of the effective-mass tensor m, (along the anisotropy axis) and m, (perpendicular to the anisotropy axis) strongly depend upon temperature. This may lead to transition between layered (m, > mu) and quasi one-dimensional (m, < m,) types of anisotropy as well as to biaxial-type anisotropy which is also temperature dependent. The field distribution in a tilted vortex in a biaxial superconductor is calculated. The change in the properties of the vortex lattice with temperature in such systems is also investigated. The properties of YBa,Cu30,/PrBa,Cu,0, multilayers are discussed in this connection.