Growth and vibrational spectra of doped KMgF3 single crystal |
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Authors: | Jia Zhihong Yu Lihua Shi Chunshan |
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Institution: | Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China. jia@mailer.uni-marburg.de |
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Abstract: | The different ions doped KMgF(3) single crystals are prepared by the vertical Bridgman method. The near-infrared absorption spectra for different parts of all as-growth crystals indicate that there is the best transparency in middle part. The correlation between the vibronic frequencies of Eu(2+) and the site displacement of Cu(+) co-doped ions is firstly studied, which indicates that Cu(+) ions replace the site of the Mg(2+) ions. The co-doped Eu(2+) counteracts the charge misfit causing by the replacement of Mg(2+) with Cu(+). The overlapping of the emission spectra of the Eu(2+) and the excitation spectra of the Cu(+) results in the energy transfer from Eu(2+) to Cu(+). |
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