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

The Cr3+-doped K0.6(Mg0.3Sc0.7)2(MoO4)3 crystal was grown from a flux of K2Mo3O10 by the top seeded solution growth method. The K0.6(Mg0.3Sc0.7)2(MoO4)3 crystal crystallizes in the rhombohedral system in space group R3c̅. The K0.6(Mg0.3Sc0.7)2(MoO4)3 crystal has a highly disordered structure. Investigation of the spectral properties of the Cr3+:K0.6(Mg0.3Sc0.7)2(MoO4)3 crystal shows that it exhibits broad absorption and emission bands, which are caused by the disordered structure of the K0.6(Mg0.3Sc0.7)2(MoO4)3 crystal, except for the broad emission of Cr3+ 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 Cr3+ ion occupies the low crystal field site in the Cr3+:K0.6(Mg0.3Sc0.7)2(MoO4)3 crystal. These results suggest that the Cr3+:K0.6(Mg0.3Sc0.7)2(MoO4)3 crystal is a potential tunable laser crystal material.