Near-band gap optical behavior of sputter deposited α- and α+β-ZrO2 films

Abstract
The functional dependence of the optical absorption coefficient on photon energy in the 4.9–6.5 eV range was determined for α‐ and α+β‐ZrO2 films grown by reactive sputter deposition on fused silica. Two allowed direct interband transitions in α‐ZrO2 were identified, with energies equal to 5.20 and 5.79 eV. Modification of these transitions in α+β‐ZrO2 is reported.