Тип публикации: статья из журнала
Год издания: 2008
Идентификатор DOI: 10.1063/1.2902365
Ключевые слова: Absorption, Europium alloys, Garnets, Ultraviolet radiation, Calcium-free flux, Flux-grown europium gallium garnet, Color centers
Аннотация: Europium gallium garnet (EuGG) single crystals were grown from fluxes with various contents. Optical absorption spectra of EuGG grown from a flux containing calcium show an additional band in the ultraviolet and blue regions of the spectra as compared to the case of a calcium-free flux. Mossbauer spectra of the samples grown from tПоказать полностьюhe fluxes with different additives show no signs of other valence states of the europium ions except for 3+. However, they indicate changes in the crystal field due to the entrance of additive ions. The nature of the additional absorption must be the same as that for calcium-doped gadolinium gallium garnet, i.e., anion vacancies. Mossbauer isotope shifts and quadrupole splitting for EuGG are determined. (C) 2008 American Institute of Physics.
Журнал: JOURNAL OF APPLIED PHYSICS
Выпуск журнала: Vol. 103, Is. 8
Номера страниц: 083102
ISSN журнала: 00218979
Место издания: MELVILLE
Издатель: AMER INST PHYSICS