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Abstract
The optical constants n and k of Al-40 wt% Zn alloy thin films deposited at room temperature were calculated using a transmission spectrum in the wavelength range from 2.5 to 20 μm. The thickness of the films ranged from 10 to 85 nm. The investigated samples were aged at 373 K and 473 K for 1 h and some micro-characteristics of Al-Zn alloy films such as the free charge concentration N, the relaxation time τ, the static conductivity σ, the electron velocity at Fermi surface V f and Fermi energy were determined. The effective absorption assumed the value 63.7% and the absorption due to bound electrons is therefore 36.3%. The role of the solute atoms (Zn) was considered to explain the results.
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