We report on physical mechanisms and methods for optical (λ=300-150 nm) patterning of thin alloyed layers of transition metals (Fe, Co) via laser-induced ferromagnetic ordering (LIFO) in the initially paramagnetic alloys. It is argued that LIFO preceded by film melting and arises due to phase separation in the alloys. Using a laser (λ=300-150 nm) interferometric technique for direct patterning on the phase transitions, we have successfully produced large-area (up to 1 cm) arrays of nanoscale (down to 100 nm) magnets. Due to the observed threshold character of LIFO, the patterned features can be small comparable to the radiation wavelength (~λ/10). This finding is expected to allow making the extreme features (down to 15-20 nm) and thus gives a potential advantage for using such directly patterned magnetic media in future storage data systems with ultrahigh densities ( ~ 1 Tbit/in<sup>2</sup>). The first experiments on formation of the extreme features by use of LIFO have been performed.
Deposition possibility of small d-spacing (d equals 0.7 - 3 nm) multilayers on the basis of the material combinations W/Sb, W/Sc, Cr/Sc, Fe/Sc and their utilization as dispersive and focusing elements for the photon energy range E > 0.3 kev have been investigated. The use of the normal incidence spherical multilayers W/Sb, W/Sc and Cr/Sc for imaging of a high temperature laser produced plasma within the `water window' spectral range (0.3 < E < 0.5 kev) is presented.
Deposition possibility of the small d-spacing (d approximately 1 - 2 nm) multilayers on the basis of the material combinations W/Sb, W/B4C, Cr/Sb, Cr/Sc, Fe/Sc, and their utilization as dispersive and focusing elements for the photon energy range E > 0.3 keV have been investigated. The employment of the normal incidence spherical multilayers W/Sb and Cr(Fe)/Sc for imaging of a high-temperature laser-produced plasma within the `water window' spectral range (0.3 < E < 0.5 keV) are presented.