Temperature dependence of PL and EPR spectra of Sr0.33Ba0.67Nb2O6:Cr (0.02 mol%) single crystals
作者： Sławomir M Kaczmarek , Taiju Tsuboi , Anna Leniec , Yosuke Nakai , Grzegorz Leniec
DOI: 10.1016/J.JCRYSGRO.2014.02.035
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摘要: Abstract Sr 0.33 Ba 0.67 Nb 2 O 6 :Cr (0.02 mol%) single crystals have been prepared by the Czochralski method. They were investigated electron paramagnetic resonance and photoluminescence in a temperature range of 3–300 K. The EPR signal shows at least two magnetically non-equivalent centers. We calculated angular dependences spectra, spin Hamiltonian parameters for both Low spectra reveal emission bands 765 824 nm addition to an intense band 537 nm. From PL analysis, it is suggested that different Cr-associated defect centers are present this crystal.
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