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Structure of superconducting (BaCuOx)2/(CaCuO2)n superlattices on SrTiO3(001) investigated by x-ray scattering

: Aruta, C.; Zegenhagen, J.; Cowie, B.; Balestrino, G.; Pasquini, G.; Medaglia, P.G.; Ricci, F.; Luebbert, D.; Baumach, T.; Riedo, E.; Ortega, L.; Kramer, R.; Albrecht, J.


Physica status solidi. A 183 (2001), No.2, pp.353-364
ISSN: 0031-8965
ISSN: 1862-6300
ISSN: 1521-396X
ISSN: 1862-6319
Journal Article
Fraunhofer IZFP, Institutsteil Dresden ( IKTS-MD) ()

Structural properties of [BaCuOx](2)/[CaCuO2](n) superconducting superlattices with a number of CaCuO2 layers ranging between 2 and 3 were investigated using synchrotron radiation, by coplanar (symmetrical and asymmetrical) X-ray diffraction and also in grazing incidence,geometry. This extensive X-ray diffraction characterisation allowed to confirm the pseudomorphic growth of [BaCuOx](2)/[CaCuO2](n) superlattices on the SrTiO3 (001)-oriented substrate. Reciprocal space maps in symmetrical configuration, i.e. by specular reflection, showed the effect of a slight miscut of the substrate on the inclination of the rods. Finally, the interface and surface morphology were investigated by diffuse scattering obtaining the in-plane and out-of-plane correlation properties of the interface roughness and these results were compared with the surface roughness measured by atomic force microscopy.