| NH4H2PO4晶体反铁电相的对称性及序参量 |
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| 引用本文： | 韩代朝,马素敏,蔡玉平.NH4H2PO4晶体反铁电相的对称性及序参量[J].人工晶体学报,2004,33(2):254-257. |
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| 作者姓名： | 韩代朝 马素敏 蔡玉平 |
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| 作者单位： | 军械工程学院基础部,石家庄,050003;河北师范大学外国语学院,石家庄,050016 |
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| 基金项目： | 军械工程学院校科研和教改项目 |
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| 摘 要： | 在反铁电晶体NH4H2PO4(ADP)顺电反铁电相变中,对称性所属点群也随之发生相应的改变.通过对实验结果的分析,我们认为NH4H2PO4(ADP)晶体反铁电相对称性所属点群为P2(C2).选用轴矢量R作为序参量来描述NH4H2PO4(ADP)晶体反铁电相变中对称性的变化,应用居里原理,恰能得到NH4H2PO4(ADP)晶体反铁电相的正确对称性所属点群P2(C2).
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| 关 键 词： | 反铁电相 相变 序参量 居里原理 轴矢量 |
| 文章编号： | 1000-985X(2004)02-0254-04 |
Symmetry and Order Parameter of the Antiferroelectrics NH4H2PO4 |
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| HAN Dai-zhao,MA Su-min,CAI Yu-ping.Symmetry and Order Parameter of the Antiferroelectrics NH4H2PO4[J].Journal of Synthetic Crystals,2004,33(2):254-257. |
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| Authors: | HAN Dai-zhao MA Su-min CAI Yu-ping |
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| Institution: | HAN Dai-zhao~1,MA Su-min~2,CAI Yu-ping~1 |
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| Abstract: | In the paraelectric-antiferroelectric phase transition of antiferroelectrics NH_4H_2PO_4, the symmetry of crystalloid changes. This paper investigated the results of some experiments, and drew the conclusion that the symmetry of antiferroelectric NH_4H_2PO_4 is P2(C_2). Here,an axial vector R is selected as the order parameter to reflect the change of symmetry in antiferroelectric phase NH_4H_2PO_4. According to Curie principle, the symmetry of antiferroelectrics NH_4H_2PO_4 is P2(C_2),which is coincided with the results of experiments perfectly. |
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| Keywords: | antiferroelectric phase phase transition order parameter Curie principle axial vector |
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