Low Temperature Phase Transition of an Orthorhombic Tungsten Bronze Ferroelectric Sr2-xCaxNaNb5O15

Chin. Phys. Lett.

1993, Vol. 10

Issue (3): 183-185 DOI:

Original Articles

Low Temperature Phase Transition of an Orthorhombic Tungsten Bronze Ferroelectric Sr_2-xCa_xNaNb₅O₁₅

ZHONG Weilie;ZHANG Peilin;ZHAO Huansui;HAN Zhaozhong^*;CHEN Huanchu^*

Department of Physics, Shandong University, Jinan 250100 ^*Institute of Crystal Materials, Shandong University, Jinan 250100

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ZHONG Weilie, ZHANG Peilin, ZHAO Huansui et al 1993 Chin. Phys. Lett. 10 183-185

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Abstract The dielectric and pyroelectric properties of a new ferroelectric crystal with orthorhombic tungsten bronze structure Sr_2-xCa_xNaNb₅O₁₅ have been investigated in the temperature range of 300 to 10 K. Based on anomalies in the properties and by use of Curie's principle of symmetry, a ferroelectric-ferroelectric phase transition between mm2 and m is found to occur at about 75K. On cooling through the transition, the spontaneous polarization deviates by about two degrees from the two-fold axis [001] to[h0l] direction in the mirror plane.

Keywords: 77.80.-e

Published: 01 March 1993

PACS:

77.80.-e

(Ferroelectricity and antiferroelectricity)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1993/V10/I3/0183

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	ZHONG Weilie
	ZHANG Peilin
	ZHAO Huansui
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	CHEN Huanchu

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