ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The effect of high-temperature annealing on the optical properties of a calcium doped yttrium iron garnet (Ca:YIG) film were studied. The optical absorption was examined for a film of Ca0.18:YIG reduced in an atmosphere of N2 at temperatures above 900 °C. During the annealing, the optical absorption initially decreased below the as-grown value as expected, but subsequently increased to a value greater than that for the as-grown film as the annealing temperatures were increased. The changes observed in the optical absorption are believed to be due to the introduction of oxygen vacancies in the film as a result of the annealing. Initially, the added oxygen vacancies simply compensate the Ca2+, while successive annealings introduce excess vacancies which lead to a new absorption mechanism. The results of this study and the expected mechanism for the effect are reported. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.361335
