Alloy-ceramic oxide multilayer mirrors for water-window soft x rays

Autor: Vitta, Satish, Weisheit, Martin, Scharf, Thorsten, Krebs, H.-U.
Zdroj: Optics Letters; September 2001, Vol. 26 Issue: 18 p1448-1450, 3p
Abstrakt: Alloy–ceramic oxide multilayers of Ni_80Nb_20– MgO with 3.56-nm period have been made by use of the pulsed-laser deposition technique and characterized by means of grazing-incidence x-ray reflectivity. The interface roughness was found to be only ~0.35 nm at the two interfaces, Ni_80Nb_20– MgO and MgO–Ni_80Nb_20, leading to a peak reflectivity of ~38% at the first order. The atomic structure in the two individual layers, Ni_80Nb_20 and MgO, is found to be amorphous, in agreement with the deposition conditions. These multilayers can be used as mirrors for soft x rays in the angular range 18° to 39°, depending on the actual wavelength of radiation in the water-window region.
Databáze: Supplemental Index