Origin of color centers in the flux-grown europium gallium garnet

Journal Article · Tue Apr 15 00:00:00 EDT 2008 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2902365· OSTI ID:21137142

Aleksandrovsky, A S; Arkhipkin, V G; Bezmaternykh, L N; Gudim, I A; Krylov, A S ^[1]; Vagizov, F ^[2]

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1. L. V. Kirensky Institute of Physics, Akademgorodok, Krasnoyarsk 660036, Russia and Siberian Federal University, Krasnoyarsk 660079 (Russian Federation)
2. Department of Physics, Texas A and M University, College Station, Texas 77840 (United States)

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. Moessbauer spectra of the samples grown from the 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. Moessbauer isotope shifts and quadrupole splitting for EuGG are determined.

• OSTI ID: 21137142
• Journal Information: Journal of Applied Physics, Vol. 103, Issue 8; Other Information: DOI: 10.1063/1.2902365; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
ABSORPTION SPECTRA
ANIONS
CALCIUM
COLOR CENTERS
CRYSTAL FIELD
CRYSTAL GROWTH
DOPED MATERIALS
EUROPIUM COMPOUNDS
EUROPIUM IONS
GADOLINIUM COMPOUNDS
GALLIUM COMPOUNDS
GARNETS
MOESSBAUER EFFECT
MONOCRYSTALS
QUADRUPOLES
SPECTRAL SHIFT
ULTRAVIOLET RADIATION
ULTRAVIOLET SPECTRA