在反铁电晶体锆酸铅(PbZrO3)顺电反铁电相变中,伴随有对称性的变化.前人工作中选择反极化参量(P)或子晶格的极化矢量(PA、PB)作为反铁电相的序参量,根据居里原理得出了反铁电晶体锆酸铅反铁电相对称性所属空间群为Pbam(D2h)或Pba2(C2v).但是通过对中子衍射实验结果分析,该晶体反铁电相对称性所属空间群不是Pbam(D2h)或Pba2(C2v),而是P2/m(C2i).本文选取轴矢量R作为反铁电相的序参量,对锆酸铅晶体应用居里原理,恰能得到正确的对称性P2/m(C2i).
参考文献
| [1] | Jona F;Shirane G;Mazzi F;Pepinsky R .Optical Study of PbZrO3 and NaNbO3 Single Crystals[J].Physical Review,1957,105:849. |
| [2] | Jona F;Shirane G;Pepinsky R .X-ray and Neutron Diffraction Study of Antiferroelectrics Lead Zirconate 3 PbZrO3[J].Physical Review,1955,97:1584. |
| [3] | Shatalova G E;Filip'ev V S;Katsnel'son L M;Fesenko E G .[J].Soviet Physics Crystallography,1974,19:412. |
| [4] | Smolenskii G A.Ferrielectrics and Related Materials[M].New York: Gordon and Breach Science Pub,1984 |
| [5] | Hideshi Fujishita .Sadao Hoshino[J].Journal of The Physical Society of Japan,1983,53:226. |
| [6] | Tanaka M;Saito R;Tsuzuki K .The Subsequent Powder Neutron Diffraction Profile Analysis of PbZrO3[J].Journal of the Physical Society of Japan,1982,51:2635. |
| [7] | Glazer A M;Roleder K;Dec J .Structure and Disorder in Single-crystal Lead Zirconate[J].Acta Crystallographica,1993,B49:846. |
| [8] | Corker D L;Glazer A M;Dec J .[J].Acta Crystallographica,1993,B49:155. |
| [9] | Teslic S;Egame T .Atomic Structure of PbZrO3 Deternined by Pulsed Neutron Diffraction[J].Acta Crystallographica,1998,B54:750-765. |
| [10] | Scott B A;Burns G .[J].Journal of the American Ceramic Society,1972,55:331. |
| [11] | Cowley R A .Lattice Dynamics and Phase Transitions of Strontium Titanate[J].Physical Review,1965,A981:134. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%