| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Evolution from Diffuse Ferroelectric to Relaxor Ferroelectric in Pb1?xBax(Fe1/2Nb1/2)O3 Solid Solutions |
| LV Xin, WANG Nan, CHEN Xiang-Ming** |
Laboratory of Dielectric Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027
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| Cite this article: |
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LV Xin, WANG Nan, CHEN Xiang-Ming 2014 Chin. Phys. Lett. 31 077701 |
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Abstract Dielectric and ferroelectric characteristics for Pb1?xBax(Fe1/2Nb1/2)O3 (x=0, 0.05, 0.1, 0.15, and 0.2) ceramics are determined together with their structures. X-ray diffraction (XRD) analysis confirms the solid solutions with the cubic structure. The dielectric nature changes from diffuse ferroelectric to relaxor ferroelectric with increasing x, while the phase transition temperature TC (or Tm) decreases monotonously. The diffuse ferroelectric phase transition is observed in the solid solutions with 0≤x≤0.05. For Pb1?xBax(Fe1/2Nb1/2)O3 with 0.1≤x≤0.2, relaxor ferroelectric behavior is determined, and the Vogel–Fulcher equation is used to describe the relaxor behavior. The 1/ϵ versus T plots reveal the diffusion dielectric characteristics in both diffuse and relaxor ferroelectrics.
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Published: 30 June 2014
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| PACS: |
77.80.bg
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(Compositional effects)
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77.22.Ej
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(Polarization and depolarization)
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61.05.cf
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(X-ray scattering (including small-angle scattering))
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77.80.Jk
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(Relaxor ferroelectrics)
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