A study of structures and order parameters in antiferroelectric PbHfO3 by synchrotron radiation

被引：15

作者：

Fujishita, H ^{[1
]}

Ishikawa, Y

Ogawaguchi, A

Kato, K

Nishibori, E

Takata, M

Sakata, M

机构：

[1] Kanazawa Univ, Dept Phys, Kanazawa, Ishikawa 9201192, Japan

[2] JASRI, SPring 8, Mikazuki, Hyogo 6795198, Japan

[3] JST, CREST, Kawaguchi, Saitama 3320012, Japan

[4] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2005年 / 74卷 / 10期

关键词：

antiferroelectrics; PbHfO3; structure; spontaneous strain; order parameter; phenomenological theory;

D O I：

10.1143/JPSJ.74.2743

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present structures of PbHfO3 between 100 and 525 K analyzed by a Rietveld method using synchrotron radiation. Spontaneous strain of a perovskite sublattice, could be excellently expressed by a conventional phenomenological theory in a room-temperature antiferroelectric phase. Pb shifts along the a-axis and the square root of the spontaneous strain showed similar dependence on temperature as expected from the theory below 200 K, while one of the shifts showed a slight deviation at high temperature. Disordered arrangement of Pb atoms in the Cubic phase was found as in the cubic phase of PbZrO3, though the direction of the disorder in PbHfO3 was not so obvious as that in PbZrO3.

引用

页码：2743 / 2747

页数：5

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