Multifold polar states in Zn-doped Sr0.9Ba0.1TiO3 ceramics
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 pol...
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| Published in | 中国物理B：英文版 no. 12; pp. 554 - 558 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.12.2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-1056 2058-3834 |
| DOI | 10.1088/1674-1056/24/12/127701 |
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| Summary: | 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-Ti O6 octahedra rotation, represents the core physics behind the stabilized polar state. |
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| Bibliography: | 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-Ti O6 octahedra rotation, represents the core physics behind the stabilized polar state. 11-5639/O4 SrTiO3,ferroelectricity,lattice distortion,off-center dipole moment |
| ISSN: | 1674-1056 2058-3834 |
| DOI: | 10.1088/1674-1056/24/12/127701 |