Metallic films forming on the surface of alkali-halide crystals during thermal diffusion of intracrystalline immpurities |
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| Authors: | L I Bryukvina E A Ermolaeva S N Pidgurski? L F Suvorova V M Khulugurov |
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| Institution: | (1) Institute of Laser Physics (Irkutsk Branch), Siberian Division, Russian Academy of Sciences, Irkutsk, 664033, Russia;(2) Vinogradov Institute of Geochemistry and Analytical Chemistry, Siberian Division, Russian Academy of Sciences, ul. Favorskogo 1a, Irkutsk, 664033, Russia |
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| Abstract: | It was detected for the first time that films consisting of a transition-metal-based structure form (via thermal diffusion
of intracrystalline impurities) on the surface of alkali-halide (LiF, NaF) crystals activated by transition metals Co, Ni,
or Mn. The thickness, density, and composition of the films are shown to be different, depending on the heat treatment conditions.
The crystals were annealed at temperatures varying from 473 to 1073 K in vacuum and air. The surface structures forming upon
annealing in vacuum exhibit magnetic properties. The films were studied by optical, x-ray fluorescence, and electron spectroscopy
to reveal the mechanisms of transition-metal film formation during thermal annealing. |
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