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

The Cr 3+ -doped K 0.6 (Mg 0.3 Sc 0.7 ) 2 (MoO 4 ) 3 crystal was grown from a flux of K 2 Mo 3 O 10 by the top seeded solution growth method. The K 0.6 (Mg 0.3 Sc 0.7 ) 2 (MoO 4 ) 3 crystal crystallizes in the rhombohedral system in space group R 3 c̅ . The K 0.6 (Mg 0.3 Sc 0.7 ) 2 (MoO 4 ) 3 crystal has a highly disordered structure. Investigation of the spectral properties of the Cr 3+:K 0.6 (Mg 0.3 Sc 0.7 ) 2 (MoO 4 ) 3 crystal shows that it exhibits broad absorption and emission bands, which are caused by the disordered structure of the K 0.6 (Mg 0.3 Sc 0.7 ) 2 (MoO 4 ) 3 crystal, except for the broad emission of Cr 3+ 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 3+ ion occupies the low crystal field site in the Cr 3+:K 0.6 (Mg 0.3 Sc 0.7 ) 2 (MoO 4 ) 3 crystal. These results suggest that the Cr 3+:K 0.6 (Mg 0.3 Sc 0.7 ) 2 (MoO 4 ) 3 crystal is a potential tunable laser crystal material.