Spectroscopic characterization of chromium (IV, V, VI) in Cr:Li2MSiO4 (M=Mg,Zn)
作者： C. Jousseaume , D. Vivien , A. Kahn-Harari , J. Derouet , F. Ribot
DOI: 10.1063/1.1568152
关键词:
摘要: To understand the exceptionally long fluorescence lifetime of CrIV in Li2MSiO4 (M=Mg,Zn), several spectroscopic investigations are performed on Cr:Li2MSiO4 (M=Mg,Zn) crystals. X-ray absorption near-edge structure attest that chromium is localized tetrahedral sites and CrVI major species while minor one both compounds. Electron paramagnetic resonance studies confirm occurrence CrV elongated environment (dx2−y2 ground state), corresponding probably to silicon site, suggest presence charge compensation schemes. Fluorescence dynamics CrIV:Li2MSiO4 reported. The very excited state previously observed powders samples confirmed for crystals (117 μs at room temperature, 305 30 K Cr:Li2MgSiO4) explained by combined contributions emission from 1E level lowest component 3T2 level, thermal equilibrium. Contrary situation found most activated compounds, lies below one.
scitation.org
harvard.edu
aip.org
sci-hub.se 参考文章(39)
Weiyi Jia, Huimin Liu, S. Jaffe, W. M. Yen, B. Denker, Spectroscopy ofCr3+andCr4+ions in forsterite Physical Review B. ,vol. 43, pp. 5234- 5242 ,(1991) , 10.1103/PHYSREVB.43.5234
B. Henderson, G. F. Imbusch, Optical spectroscopy of inorganic solids Clarendon Press , Oxford University Press. ,(1989)
John E. Wertz, James R. Bolton, Electron Spin Resonance: Elementary Theory and Practical Applications ,(1972)
Anatole Abragam, Electron paramagnetic resonance of transition ions ,(1970)
Anthony R. West, Solid State Chemistry and its Applications ,(1984)
K. E. Miyano, J. C. Woicik, P. Sujatha Devi, H. D. Gafney, Cr K edge x-ray absorption study of Cr dopants in Mg2SiO4 and Ca2GeO4 Applied Physics Letters. ,vol. 71, pp. 1168- 1170 ,(1997) , 10.1063/1.119615
K. A. Subbotin, V. A. Smirnov, E. V. Zharikov, A. V. Gaĭster, I. A. Shcherbakov, L. D. Iskhakova, Growth and spectral and luminescent properties of a new Cr4+:LiAlGeO4 nonlinear crystal Optics and Spectroscopy. ,vol. 89, pp. 56- 61 ,(2000) , 10.1134/BF03355988
C. Anino, J. Théry, D. Vivien, New Cr4+ activated compounds in tetrahedral sites for tunable laser applications Optical Materials. ,vol. 8, pp. 121- 128 ,(1997) , 10.1016/S0925-3467(97)00039-6
V. Petričević, S. K. Gayen, R. R. Alfano, Laser action in chromium‐activated forsterite for near‐infrared excitation: Is Cr4+the lasing ion? Applied Physics Letters. ,vol. 53, pp. 2590- 2592 ,(1988) , 10.1063/1.100536
Horacio R. Verdun, Leonard M. Thomas, Donna M. Andrauskas, Tom McCollum, Albert Pinto, Chromium‐doped forsterite laser pumped with 1.06 μm radiation Applied Physics Letters. ,vol. 53, pp. 2593- 2595 ,(1988) , 10.1063/1.100537