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Doping-Induced Structure Phase Transition of Layered Ferroelectrics Sr2+xBi4-xTi5-xNbxO18 |
HAN Jie1;ZOU Guang-tian1;GE Zhong-jiu1 |
1National Laboratory of Superhard Materials, Jilin University, Changchun 130023
2Changchun Institute of Physics, Chinese Academy of Sciences, Changchun 130021
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Cite this article: |
HAN Jie, ZOU Guang-tian, GE Zhong-jiu 1999 Chin. Phys. Lett. 16 523-525 |
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Abstract Raman spectra of layered ferroelectrics Sr2+xBi4-xTi5-xNbxO18 (0 ≤ x ≤ 2) and Sr2+xBi4-xTi5-xNbxO18 at room temperature in the range of 20-1000cm-1 were investigated. Vibration modes were assigned with the internal mode approach. Two doping-induced structure phase transitions were observed at about x = 0.5 and 1.25 for Sr2+xBi4-xTi5-xNbxO18, separately.
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Keywords:
61.50.Ks
64.70.Kb
77.80.Bh
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Published: 01 July 1999
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