Growth and magneto-optical characteristic of Ho2Ti2O7 crystal

A pyrochlore crystal with magneto-optical effect—Ho2Ti2O7 crystal has been grown by Czochralski method. X-ray powder diffraction, magnetic susceptibility, transmission spectrum and Faraday rotation of single crystal Ho2Ti2O7 were measured. The results of Rietveld refinement revealed that the crystal belongs to cubic system and the lattice parameters calculated by Jade 7.0 (Materials Data, Inc.) were a=1.00915(7)nm and V=1.0277nm3. The effective magnetic moment and Curie–Weiss temperature of Ho2Ti2O7 crystal are 10.4μB and 1.86K, respectively. The transmittance of Ho2Ti2O7 crystals grown in Ar can be more than 72% in 700–1080nm and 1260–1500nm. The Verdet constant of Ho2Ti2O7 crystal at 1064nm comes up to −54.1rad/(mT), which is 1.35 times as large as that of Tb3Ga5O12 reported.