| SrTiO3铁电体反铁畸变的序参量半 |
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| 引用本文： | 许伟钊,蔡玉平.SrTiO3铁电体反铁畸变的序参量半[J].功能材料,2007,38(A02):791-792. |
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| 作者姓名： | 许伟钊 蔡玉平 |
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| 作者单位： | [1]军械工程学院火炮工程系,河北石家庄050003 [2]军械工程学院基础部,河北石家庄050003 |
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| 摘 要： | 钛酸锶（SrTi03）的反铁畸变是氧八面体绕001]轴转过一微小角度θ引起的。提出一种晶体学原胞的选取方法，能很好地说明相变前后对称性的变化。由居里原理，分析其序参量是一个三阶全对称的极张量。
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| 关 键 词： | 反铁畸变 对称性 序参量 居里原理 |
| 文章编号： | 1001-9731（2007）增刊-0791-02 |
| 修稿时间： | 2007-01-19 |
Order parameter of strontium titanateduring antiferrodistortive phase transition |
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| XU Wei-zhao, CAI Yu-ping.Order parameter of strontium titanateduring antiferrodistortive phase transition[J].Journal of Functional Materials,2007,38(A02):791-792. |
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| Authors: | XU Wei-zhao CAI Yu-ping |
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| Affiliation: | i. Department of Gannon Engineering; Ordnance Engineering College, Shijiazhuang 050003, China; 2.Department of basic Courses, Ordnance Engineering College, Shijiazhuang 050003, China |
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| Abstract: | The antiferrodistortive phase transition in Strontium Titanate is driven by the rotation of the oxygen octahedral around 001] cubic axes. In the most previous papers, it is unsuitable selecting the unit cell of Strontium Titanate, which cannot reflect the change of the crystal structure symmetry. A new type of unit cell is given, which can reflect the symmetry changes perfectly during phase transition. According to the Curie principle, a third-order complete symmetry polarization tensor is put forward as the order parameter of antiferrodistortive phase transition. |
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| Keywords: | antiferrodistortive phase transition symmetry order parameter Curie principle |
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