Re‐entrant relaxor behavior in BaTiO3‐Bi(Zn2/3Nb1/3)O3 ceramics |
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Authors: | Longwen Wu Xiaohui Wang Zhengbo Shen Bingcheng Luo Longtu Li |
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Affiliation: | State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, China |
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Abstract: | The (1?x)BaTiO3?xBi(Zn2/3Nb1/3)O3 (x=0.10‐0.25) ceramics were fabricated via solid‐state reactions. Temperature‐dependent polarization measurement reveals that with the temperature lowering, the remnant polarization increases till a maximum value before it decreases, showing a reentrant phenomenon. Absence of apparent switching current peaks in the current density as a function of electric field should indicate the lack of a ferroelectric transition, which is further verified by the consistent macroscopic phase structure from the Raman spectra. An anomalous peak in the full width at half maximum of a deconvoluted mode at ~515 cm?1 suggests the entering of a more disordered state of dipolar dynamics, which may be originated from the competition between the freezing of polar nanoregions and the random interacting fields. |
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Keywords: | BaTiO3− Bi(Zn2/3Nb1/3)O3 ceramic reentrant relaxor |
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