Regensburg 2002 – scientific programme
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DS: Dünne Schichten
DS 27: Postersitzung
DS 27.29: Poster
Tuesday, March 12, 2002, 15:30–17:30, Poster Physik B
THE OPTICAL PROPERTIES OF THE Ni5La, Ni5Y AND Ni5Ce MAGNETICS THIN LAYERS — •Daniela Todoran1, Radu Todoran1, Marin Coldea2, and Iulia Caraman3 — 1North University of Baia Mare, Romania — 2Babes-Bolyai University Cluj-Napoca, Romania — 3Iassy University, Romania
By vaporizing the binary compounds Ni5La, Ni5Y, and Ni5Ce with laser light impulses, thin layers of the above compounds were prepared on glass and quartz substrates. The thickness of the metallic strata range within the limits of 150A- 1200A. The reflection and transmission spectra were increased in the visible and UV domains of the spectrum which led to finding out the spectral dependences of the adsorption coefficient. By analyzing the spectral dependence of the absorption coefficient in the domain of the basic band borderline, the nature of the optical transitions and the width of the forbidden optical band were established for the examined the metallic strata. Using the Kramers-Kronig formalism in the reflection spectra, the dispersion of the optical constants n, k , dR/dE , e 1, and e 2 is determined in the domain 1,3eV-6,0eV.