Structure, thermal stability, and reflectivity of Sc/Si and Sc/W/Si/W multilayer x-ray mirrors

Autor: Yurii P. Pershin, Dmitrii L. Voronov, Alexander V. Vinogradov, Oleg Penkov, V. V. Kondratenko, Eugeniy Zubaryev, Yurii A. Uspenskii, I. A. Artioukov, John F. Seely
Rok vydání: 2001
Předmět:
Zdroj: Soft X-Ray Lasers and Applications IV.
ISSN: 0277-786X
DOI: 10.1117/12.450595
Popis: Processes going on at elevated temperatures between Sc and Si layers in Sc/Si coatings are studied by X-ray scattering and cross-sectional transmission electron microscopy. It is shown that the W layers of 0.5-0.8 nm placed at Sc-Si interfaces form effective barriers preventing the penetration of Si into Sc. The effects of Si-Sc diffusion and W-barriers on the reflectivity of coatings are calculated in good agreement with experimental results. Presented measurements show that the Sc/W/Si/W multilayers with the period of 20.5 nm fabricated by dc-magnetron sputtering possess thermal stability up to 250 C and the normal incidence reflectivity of 24% at wavelengths about 40 nm.
Databáze: OpenAIRE