Spectroscopy of Cr sup 3+ and Cr sup 4+ ions in forsterite

Journal Article · Fri Mar 01 00:00:00 EST 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.5234· OSTI ID:5487922

Jia, W; Liu, H; Jaffe, S; Yen, W M ^[1]; Denker, B ^[2]

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1. Department of Physics, University of Georgia, Athens georgia 30602 (USA) Department of Astronomy, University of Georgia, Athens, Georgia 30602 (USA)
2. Institute of General Physics, Academy of Sciences of the Union of Soviet Socialist Republics, Lenin Prospect 53, 117924 Moscow, Russia (SU)

Fluorescence and site-selective excitation spectra of chromium-activated forsterite at 10 K are reported. It is found that a high-field Cr{sup 3+} site in inversion symmetry emits sharp {ital R}{sub 1} line fluorescence, while a low field Cr{sup 3+} site in mirror symmetry produces {sup 4}{ital T}{sub 2} broadband emission. The dominant absorption in the visible is shown to be the {sup 3}{ital A}{sub 2}{r arrow}{sup 3}{ital T}{sub 1}({sup 3}{ital F}) transitions of Cr{sup 4+} in tetrahedral sites. In the near-infrared region, three sharp lines from Cr{sup 4+} were observed and are assigned to the transition from the {sup 3}{ital A}{sub 1}({sup 3}{ital T}{sub 2}) spin triplet to the {sup 3}{ital A}{sub 2} ground state. The energy-level splittings of Cr{sup 4+} due to an orthorhombic-distorted field with spin-orbit coupling are discussed.

• DOE Contract Number: FG09-87ER45291
• OSTI ID: 5487922
• Journal Information: Physical Review, B: Condensed Matter; (USA), Vol. 43:7; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM IONS
FLUORESCENCE
MAGNESIUM SILICATES
IMPURITIES
CRYSTAL STRUCTURE
INFRARED RADIATION
LASER MATERIALS
SPECTROSCOPY
ULTRALOW TEMPERATURE
VISIBLE RADIATION
ALKALINE EARTH METAL COMPOUNDS
CHARGED PARTICLES
ELECTROMAGNETIC RADIATION
IONS
LUMINESCENCE
MAGNESIUM COMPOUNDS
MATERIALS
OXYGEN COMPOUNDS
RADIATIONS
SILICATES
SILICON COMPOUNDS
360603* - Materials- Properties