Doping-Induced Structure Phase Transition of Layered Ferroelectrics Sr2+xBi4-xTi5-xNbxO18

Chin. Phys. Lett.

1999, Vol. 16

Issue (7): 523-525 DOI:

Original Articles

Doping-Induced Structure Phase Transition of Layered Ferroelectrics Sr_2+xBi_4-xTi_5-xNb_xO₁₈

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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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 Sr_2+xBi_4-xTi_5-xNb_xO₁₈ (0 ≤ x ≤ 2) and Sr_2+xBi_4-xTi_5-xNb_xO₁₈ 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 Sr_2+xBi_4-xTi_5-xNb_xO₁₈, separately.

Keywords: 61.50.Ks 64.70.Kb 77.80.Bh

Published: 01 July 1999

PACS:	61.50.Ks	(Crystallographic aspects of phase transformations; pressure effects)
	64.70.Kb
	77.80.Bh

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1999/V16/I7/0523

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