Preparation and Optical Characterization of Yb3Sb5O12: Discussion of Its Suitability for Laser Operation
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- 作者：Concepció ; n Cascales ; Carlos Zaldo ; and Regino Sá ; ez-Puche
- 刊名：Chemistry of Materials
- 出版年：2005
- 出版时间：April 19, 2005
- 年：2005
- 卷：17
- 期：8
- 页码：2052 - 2058
- 全文大小：165K
- 年卷期：v.17,no.8(April 19, 2005)
- ISSN：1520-5002
文摘
Pure and polycrystalline samples of Yb3Sb5O12 were prepared under vacuum by solid-state reaction.In this cubic matrix, space group I
3m (No. 217), Z = 4, Yb3+ occupies a single crystallographic sitewith point symmetry S4. The confident determination of the Yb3+ energy levels was carried out throughthe analysis of 9 K optical absorption (OA) and photoluminescence (PL) spectra, and 300 K Ramanmeasurements, assisted by models and procedures providing proper estimations of crystal-field (CF)interactions in this host. The parametrization of free-ion and CF effects for Er3+ in Er3Sb5O12 has beenrevised and then used as reference in the simulation of Yb3+ CF energy levels. The correctness of theenergy level sequence of Yb3+ in Yb3Sb5O12, which is characterized by a large splitting for the 2F7/2ground state, 933 cm-1, and the composition of the associated wave functions were tested through thesuccessful reproduction of the thermal evolution of the paramagnetic molar susceptibility 
m ofYb3Sb5O12. Some parameters of interest accounting for application perspectives as a laser material havebeen evaluated and compared with those corresponding to other stoichiometric and Yb-doped confirmedlaser materials.
3m (No. 217), Z = 4, Yb3+ occupies a single crystallographic sitewith point symmetry S4. The confident determination of the Yb3+ energy levels was carried out throughthe analysis of 9 K optical absorption (OA) and photoluminescence (PL) spectra, and 300 K Ramanmeasurements, assisted by models and procedures providing proper estimations of crystal-field (CF)interactions in this host. The parametrization of free-ion and CF effects for Er3+ in Er3Sb5O12 has beenrevised and then used as reference in the simulation of Yb3+ CF energy levels. The correctness of theenergy level sequence of Yb3+ in Yb3Sb5O12, which is characterized by a large splitting for the 2F7/2ground state, 933 cm-1, and the composition of the associated wave functions were tested through thesuccessful reproduction of the thermal evolution of the paramagnetic molar susceptibility m ofYb3Sb5O12. Some parameters of interest accounting for application perspectives as a laser material havebeen evaluated and compared with those corresponding to other stoichiometric and Yb-doped confirmedlaser materials.