Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9829681 | Journal of Crystal Growth | 2005 | 6 Pages |
Abstract
Raman scattering, Stokes photoluminescence (PL) spectroscopy and differential scanning calorimetry (DSC) measurements have been used to study the phase transition of 2Â mol% erbium-doped potassium niobate (KNbO3) polycrystalline. The low-temperature Raman scattering experiments showed that the phase transition occurred at around 200 and 300Â K, and the DSC thermograms indicated that the phase transition occurred at 203, 290, 481 and 666Â K, respectively. Comparing our results with Matthias's, we proposed that 2Â mol% erbium-doped KNbO3 polycrystalline exhibits a new phase transition at 203Â K. The PL spectra intensity was also unusual during these temperatures; a strong non-exponential behavior was found. From these results of Raman scattering, DSC and PL, we concluded that the behavior of 2Â mol% erbium-doped KNbO3 polycrystalline at 203Â K should be a new phase transition.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Cheng-Hung Wen, Sheng-Yuan Chu, Yung-Der Juang, Cheng-Kuo Wen,