Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

Study of optical properties of Cr3+ ions in Cs2NaAlF6 single crystals

2000; Elsevier BV; Volume: 114; Issue: 12 Linguagem: Inglês

10.1016/s0038-1098(00)00107-1

1879-2766

L. P. Sosman, Armando Dias Tavares, R. J. M. da Fonseca, T. Abritta, Н.М. Хайдуков,

Glass properties and applications

Emission and excitation spectra for Cs2NaAlF6:Cr3+ are presented. The near-infrared fluorescence observed at 77 and 4.2 K are attributed to the zero-phonon spin-forbidden transition 2E(2G)→4A2(4F) while at room-temperature the emission is assigned to the 2T2(2F)→4A2(4F) transition. Two non-equivalent octahedral sites are identified through time-resolved measurements and lifetime fluorescence bands are measured. The Racah and crystal-field parameters are calculated for both sites.