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Concentration series of SrMoO:Pr crystals are grown by the Czochralski method from the melt. The doping impurity was introduced in a form of the PbNbO compound, which provides an effective distribution coefficient of praseodymium ions in this matrix of 0.9. The correlation of crystallization parameters with the real structure of the crystals grown is investigated. The technology of fabrication of optically uniform single crystal 15 mm in diameter and up to 75 mm in length is developed. The temperature dependences of heat conductivity are investigated, and the heat conductivity coefficients are determined for nominally pure and Pr-doped crystals. It is shown that the introduction of praseodymium ions reduces the heat conductivity of strontium molybdate from 4.2 W/(m K) for the undoped crystal to 3.65 W/(m K) for SrMoO:Pr (0.014 at %). The spectral-luminescent characteristics of SrMoO:Pr crystals are investigated. A series of characteristic bands with intensity proportional to the concentration of the doping ion is observed in the absorption spectra. The luminescence spectrum is obtained with a diode laser pumping at a wavelength of 450 nm and luminescence quenching kinetics is investigated. The luminescence intensity maximum is observed at a wavelength of 646 nm ( P- F transition). The luminescence lifetime was 1.5 μs. [ABSTRACT FROM AUTHOR]

The dependence of the Nd segregation coefficient on Nd concentration in PbWO4 and PbMoO4 melts and on the method of its introduction is analyzed. In a study of the PbMoO4-Nd2(MoO4)3 pseudobinary system, the existence of the PbNd4(MoO4)7 compound is established for the first time. Its structure is identified, the melting temperature and character are determined, and a single crystal is grown. The dependences of the damage threshold and anomalous biaxiality angle of PbWO4:Nd3+ and PbMoO4:Nd3+ crystals on the concentration of the activator and the method of its introduction are investigated. [ABSTRACT FROM AUTHOR]