ELASTIC PROPERTIES OF THE FLUX-LINE-LATTICE IN HIGH-T(C)-SUPERCONDUCTORS

Citation
S. Nieber et H. Kronmuller, ELASTIC PROPERTIES OF THE FLUX-LINE-LATTICE IN HIGH-T(C)-SUPERCONDUCTORS, Physica. C, Superconductivity, 213(1-2), 1993, pp. 43-50
Citations number
33
Categorie Soggetti
Physics, Applied
ISSN journal
09214534
Volume
213
Issue
1-2
Year of publication
1993
Pages
43 - 50
Database
ISI
SICI code
0921-4534(1993)213:1-2<43:EPOTFI>2.0.ZU;2-F
Abstract
The elastic matrix, governing the non-local elastic properties of the flux line lattice, is derived within the anisotropic London theory for an arbitrary arrangement of straight or curved vortices in uniaxial h igh-T(c) superconductors. The non-local elastic moduli for compression , shear and tilt of the flux line lattice in YBa2Cu3O7-delta and Bi2Sr 2CaCu2O8+delta are numerically calculated for magnetic fields of vario us strengths applied parallel and perpendicular to the c-axis. The con ventional hexagonal flux line lattice becomes soft for certain compres sion and shear modes with wave vectors near the boundary of the Brillo uin zone. A comparison of the numerical results with the isotropic app roximation is made and analytical expressions for the line tension of single flux lines oriented along one of the main axes are given.