Abstract
Synthesis of polycrystalline Nd:Sr 0.95Ba 0.05WO 4 by means of liquid-and solid-phase reaction was reported. X-ray powder diffraction results showed that the as-grown Sr 0.95Ba 0.05WO 4 and Nd: Sr 0.95Ba 0.05WO 4 single crystals belonged to tetragonal system and I4 1/ a space group. Transparent Nd: Sr 0.95Ba 0.05WO 4 single crystal could be obtained along c-axis by Czochralski method from the synthesized polycrystalline material. As the transmittance of Sr 0.95Ba .005WO 4 single crystal could reach 80%, Nd 3+ ion was adopted to be doped into the single crystal. Spontaneous Raman spectrums of polycrystalline material and single crystal were measured by RERKZN-ELMER2000 and JY-HR800. By using X-ray fluorescence method, the effective segregation coefficients of Nd, Ba, Sr, and W elements in Sr 0.95Ba .005WO 4 single crystal were estimated as 0.844 (0.745), 0.44, 1.09, and 0.95, respectively. The segregation coefficients of Nd in Sr 0.95Ba 0.05WO 4 were higher than that in BaWO 4, and this is as better as a Raman laser crystal.
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