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Transmittance and optical constants of Eu films from 8.3 to 1400 eV (Articolo in rivista)

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Transmittance and optical constants of Eu films from 8.3 to 1400 eV (Articolo in rivista) (literal)

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Fernandez-Perea, M (1); Vidal-Dasilva, M (1); Aznarez, JA (1); Larruquert, JI (1); Mendez, JA (1); Poletto, L (2); Garoli, D (2); Malvezzi, AM (3); Giglia, A (4); Nannarone, S (4) (2008)
Transmittance and optical constants of Eu films from 8.3 to 1400 eV
in Journal of applied physics; American Institute Of Physics (AIP), Melville (Stati Uniti d'America)
(literal)

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Fernandez-Perea, M (1); Vidal-Dasilva, M (1); Aznarez, JA (1); Larruquert, JI (1); Mendez, JA (1); Poletto, L (2); Garoli, D (2); Malvezzi, AM (3); Giglia, A (4); Nannarone, S (4) (literal)

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(1) CSIC, Inst Fis Aplicada, GOLD, Madrid 28006, Spain; (2) CNR, Ist Nazl Fis Mat, Dept Informat Engn, I-35100 Padua, Italy; (3) Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy; CNISM, I-27100 Pavia, Italy; (4) CNR, INFM, Lab TASC, I-34012 Trieste, Italy (literal)

Titolo

Abstract

\"The optical constants of Eu films were obtained in the 8.3-1400 eV range from transmittance measurements performed at room temperature. Thin films of Eu were deposited by evaporation in ultrahigh vacuum conditions and their transmittance was measured in situ. Eu films were deposited onto grids coated with a thin C support film. The refractive index n of Eu was calculated using the Kramers-Kronig analysis. Data were extrapolated both on the high- and low-energy sides by using experimental and calculated extinction coefficient values available in the literature. Eu, similar to other lanthanides, has a low-absorption band just below the O-2,O-3 edge onset; the lowest absorption was measured at about 16.7 eV. Therefore, Eu is a promising material for filters and multilayer coatings in the energy range below the O-2,O-3 edge in which materials typically have a strong absorption. The consistency of the composite optical constants was tested with the f and inertial sum rules and found to be good.\" (literal)

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