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Relaxor‐like behaviors in Na1/2Bi1/2Cu3Ti4O12 ceramics |
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| Authors: | Chunchang Wang Wei Ni Xiaohong Sun Le Wang Can Wang Kuijuan Jin |
| Affiliation: | 1. Laboratory of Dielectric Functional Materials, School of Physics & Material Science, Anhui University, Hefei, China;2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China |
| Abstract: | Dielectric properties of Na1/2Bi1/2Cu3Ti4O12 ceramics were evaluated over the temperature range 300‐720 K. Two relaxor‐like dielectric anomalies were found. The low‐temperature anomaly was confirmed to be an oxygen‐vacancy‐related relaxation process. It is a pseudo‐relaxor behavior caused by a bulk relaxation and a Maxwell‐Wagner relaxation. The high‐temperature one was evidenced to be an electric ferroelectric phase‐transition process resulting from the oxygen‐vacancy ordering. |
| Keywords: | dielectric relaxation electronic ferroelectricity Na1/2Bi1/2Cu3Ti4O12 ceramics relaxor |