Growth and FR characteristics of Li2Tb4(MoO4)7 crystal

Li2Tb4(MoO4)7 crystal with sizes of ∅20 × 26 mm was grown by the Czochralski method. X-ray powder diffraction was carried out and the lattice parameters were calculated, which showed that the single crystal belongs to tetragonal system. Absorption spectrum in the wavelength range of 400–1600 nm and weak absorption at 1064 nm were measured, which indicates the crystal has low absorption coefficient at 600–1500 nm regions. The Verdet constant of Li2Tb4(MoO4)7 crystal at 532 nm comes up to −347 rad/m T, which is as 1.8 times as that of TGG reported.

► Li2Tb4(MoO4)7 crystal was grown by the Czochralski method.
► Li2Tb4(MoO4)7 crystal has larger Verdet constants than those of TGG crystal.
► Li2Tb4(MoO4)7 crystal may be a candidate material for magneto-optical devices.