Growth, Structure, and Optical Properties of the Cr3+:K0.6(Mg0.3Sc0.7)2(MoO4)3 Crystal

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• 作者：Guojian Wang ; Yisheng Huang ; Lizhen Zhang ; Shengping Guo ; Gang Xu ; Zhoubin Lin ; Guofu Wang
• 刊名：Crystal Growth & Design
• 出版年：2011
• 出版时间：September 7, 2011
• 年：2011
• 卷：11
• 期：9
• 页码：3895-3899
• 全文大小：812K
• 年卷期：v.11,no.9(September 7, 2011)
• ISSN：1528-7505

文摘

The Cr<sup>3+sup>-doped K<sub>0.6sub>(Mg<sub>0.3sub>Sc<sub>0.7sub>)<sub>2sub>(MoO<sub>4sub>)<sub>3sub> crystal was grown from a flux of K<sub>2sub>Mo<sub>3sub>O<sub>10sub> by the top seeded solution growth method. The K<sub>0.6sub>(Mg<sub>0.3sub>Sc<sub>0.7sub>)<sub>2sub>(MoO<sub>4sub>)<sub>3sub> crystal crystallizes in the rhombohedral system in space group R3c̅. The K<sub>0.6sub>(Mg<sub>0.3sub>Sc<sub>0.7sub>)<sub>2sub>(MoO<sub>4sub>)<sub>3sub> crystal has a highly disordered structure. Investigation of the spectral properties of the Cr<sup>3+sup>:K<sub>0.6sub>(Mg<sub>0.3sub>Sc<sub>0.7sub>)<sub>2sub>(MoO<sub>4sub>)<sub>3sub> crystal shows that it exhibits broad absorption and emission bands, which are caused by the disordered structure of the K<sub>0.6sub>(Mg<sub>0.3sub>Sc<sub>0.7sub>)<sub>2sub>(MoO<sub>4sub>)<sub>3sub> crystal, except for the broad emission of Cr<sup>3+sup> ions. On the basis of the absorption and emission spectra, the crystal field strength Dq/B and Racah parameter C have been calculated. The Dq/B value of 2.18 implies that Cr<sup>3+sup> ion occupies the low crystal field site in the Cr<sup>3+sup>:K<sub>0.6sub>(Mg<sub>0.3sub>Sc<sub>0.7sub>)<sub>2sub>(MoO<sub>4sub>)<sub>3sub> crystal. These results suggest that the Cr<sup>3+sup>:K<sub>0.6sub>(Mg<sub>0.3sub>Sc<sub>0.7sub>)<sub>2sub>(MoO<sub>4sub>)<sub>3sub> crystal is a potential tunable laser crystal material.