Dipolar-glass-like behaviour of 0.7PMN-0.3PZ ceramic

Gurvinderjit Singh; V.S. Tiwari; V.K Wadhawan

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Dipolar-glass-like behaviour of 0.7PMN-0.3PZ ceramic

机译：0.7PMN-0.3PZ陶瓷的类偶极玻璃行为

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Relaxor ferroelectric behaviour has been observed for lead magnesium niobate-lead zirconate (0.7PMN-0.3PZ) ceramic. The freezing temperature obtained from fitting of dielectric data to the Vogel-Fulcher equation is very close to the dielectric-maximum temperature and to the temperature of collapse of remanant polarization. The temperature dependence of the spontaneous polarization follows a modified Neel's equation. Specific-heat measurement shows canonical glass-like behaviour, and the value of the glass-transition temperature is very close to the freezing temperature obtained from the Vogcl-Fulcher equation. All the observations together indicate that 0.7PMN-0.3PZ ceramic behaves like a dipolar glass.

机译：对于铌酸铅镁-锆酸铅（0.7PMN-0.3PZ）陶瓷，已经观察到弛豫铁电行为。通过将电介质数据拟合到Vogel-Fulcher方程获得的冻结温度非常接近电介质最高温度和剩余极化崩溃的温度。自发极化的温度依赖性遵循修正的尼尔方程。比热测量显示出典型的玻璃状行为，并且玻璃化转变温度的值非常接近从Vogcl-Fulcher方程获得的凝固温度。所有观察结果共同表明0.7PMN-0.3PZ陶瓷的行为类似于偶极玻璃。

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来源
《Solid State Communications》 |2004年第10期|p.665-670|共6页
作者
Gurvinderjit Singh; V.S. Tiwari; V.K Wadhawan;
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作者单位

Ceramics Laboratory, Laser Materials Division, Centre for Advanced Technology, Indore 452 013, India;

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原文格式 PDF
正文语种 eng
中图分类固体物理学;
关键词
A. dipolar glass; A. ferroelectrics; A. lead magnesium niobate-lead zirconate; D. dielectric response;

机译：A.偶极玻璃;A。铁电体;A.铌酸铅镁-锆酸铅;D.介电响应;

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Dipolar-glass-like behaviour of 0.7PMN-0.3PZ ceramic

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