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Ba3Yb(BO3)3 single crystals: Growth and spectroscopic characterization

Published online by Cambridge University Press:  31 January 2011

R. Solé ,
F. Güell ,
Jna. Gavaldà ,
M. Aguiló  and
F. Díaz
R. Solé*
Affiliation:
Física i Cristal⋅lografia de Materials (FiCMA), Universitat Rovira i Virgili (URV), Campus Sescelades, E-43007 Tarragona, Catalunya, Spain
F. Güell
Affiliation:
Enginyeria i Materials Electrònics (EME), Departament d’Electrònica, Universitat de Barcelona, E-08028 Barcelona, Catalunya, Spain
Jna. Gavaldà
Affiliation:
Física i Cristal⋅lografia de Materials (FiCMA), Universitat Rovira i Virgili (URV), Campus Sescelades, E-43007 Tarragona, Catalunya, Spain
M. Aguiló
Affiliation:
Física i Cristal⋅lografia de Materials (FiCMA), Universitat Rovira i Virgili (URV), Campus Sescelades, E-43007 Tarragona, Catalunya, Spain
F. Díaz
Affiliation:
Física i Cristal⋅lografia de Materials (FiCMA), Universitat Rovira i Virgili (URV), Campus Sescelades, E-43007 Tarragona, Catalunya, Spain
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

We obtained Ba3Yb(BO3)3 single crystals by the flux method with solutions of the BaB2O4–Na2O–Yb2O3 system. The evolution of the cell parameters with temperature shows a slope change at temperatures near 873 K, which may indicate a phase transition that is not observed by changes appearing in the x-ray powder patterns or by differential thermal analysis (DTA). The evolution of the diffraction patterns with the temperature shows incongruent melting at temperatures higher than 1473 K. DTA indicates that there is incongruent melting and this process is irreversible. Ba3Yb(BO3)3 has a wide transparency window from 247 to 3900 nm. We recorded optical absorption and emission spectra at room and low temperature, and we determined the splitting of Yb3+ ions. We used the reciprocity method to calculate the maximum emission cross section of 0.28 × 10−20 cm2 at 966 nm. The calculated lifetime of Yb3+ in Ba3Yb(BO3)3 is τrad = 2.62 ms, while the measured lifetime is τ = 3.80 ms.

Keywords

AbsorptionCrystal growthX-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 9 , September 2008 , pp. 2512 - 2518
Copyright
Copyright © Materials Research Society 2008

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