Low Angle X-Ray studies of Co/Nb multilayers
Abstract
Results of low angle X-ray scattering studies, specular and non-specular reflectivity and rocking curves, of Co/Nb multilayers are presented. Co/Nb multilayers are a possible system for a spontaneous π phase shift between the superconducting layers. The phase shift is the result of the interference of the superconducting wavefunction transmitted through the ferromagnetic layer and that reflected from the surface. Interfacial roughness then plays a role in determining the strength of the effect of the interference. Three multilayers, [Nb phd_Nb /Co phd_Co] _12/Nb_30 Åwere grown on a Si substrate via DC sputtering at pressures of 2.0, 7.5 and 10.0 mTorr of Ar. The rms interfacial roughness as well as roughness correlations and their dependence on sputtering pressure are determined. This work was supported by the Indiana 21st Century Fund and grant NSC 91-2112-M-034-001 of Taiwan.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2003
- Bibcode:
- 2003APS..MARK28011H