NMR lineshape in anisotropic superconductors

It is shown that the NMR lineshape strongly differs for various angles betw een normal to the surface of the superconductor and the external magnetic f ield direction. Thus, the surface effects drastically change the conclusion s concerning the vortex lattice and parameters of the superconductor that a re usually extracted from the NMR line shape. The NMR probing in the inclin ed magnetic fields will provide more detailed information about the paramet ers of the superconductor, especially in strongly anisotropic high-T-c supe rconductors. (C) 2000 Elsevier Science B.V. All rights reserved.