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Multifold polar states in Zn-doped Sr0.9Ba0.1TiO3 ceramics |
| Guo Yan-Yan (郭艳艳)a, Guo Yun-Jun (郭云均)b, Wei Tong (魏通)c, Liu Jun-Ming (刘俊明)d |
a College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
b School of Physics and Electronic Engineering, Jiangsu Second Normal University, Nanjing 210013, China;
c College of Science, Civil Aviation University of China, Tianjin 300300, China;
d Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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Abstract We investigate the effect of Zn doping on the dielectricity and ferroelectricity of a series of polycrystalline Sr0.9-xZnxBa0.1TiO3 (0.0% ≤ x ≤ 5.0%) ceramics. It is surprisingly observed that the Zn doping will produce the multifold polar states, i.e., the Zn-doped ceramic will convert a reduced polar state into an enhanced polar state, and eventually into a stabilized polar state with increasing the doping level x. It is revealed that in the background of quantum fluctuations, the competition between the Zn-doping-induced lattice contraction and the Ba-doping-induced lattice expansion is responsible for both the reduced polar state and the enhanced polar state coming into being. Also, the addition of the antiferrodistortive effect, which is the antipolar interaction originating from the opposite tilted-TiO6 octahedra rotation, represents the core physics behind the stabilized polar state.
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Received: 13 August 2015
Revised: 02 September 2015
Accepted manuscript online:
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PACS:
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77.22.Ch
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(Permittivity (dielectric function))
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77.80.B-
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(Phase transitions and Curie point)
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77.84.Cg
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(PZT ceramics and other titanates)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11304158, 51431006, 51102277, and 11104118), the Scientific Research Foundation of Nanjing University of Posts and Telecommunications, China (Grant No. NY213020), and the Qing Lan Project of Jiangsu Province, China. |
Corresponding Authors:
Liu Jun-Ming
E-mail: liujm@nju.edu.cn
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Cite this article:
Guo Yan-Yan (郭艳艳), Guo Yun-Jun (郭云均), Wei Tong (魏通), Liu Jun-Ming (刘俊明) Multifold polar states in Zn-doped Sr0.9Ba0.1TiO3 ceramics 2015 Chin. Phys. B 24 127701
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