A study of structures and order parameters in antiferroelectric PbHfO 3 by synchrotron radiation

Hideshi Fujishita; Yuya Ishikawa; Akira Ogawaguchi; Kenichi Kato; Eiji Nishibori; Masaki Takata; Makoto Sakata

doi:10.1143/JPSJ.74.2743

A study of structures and order parameters in antiferroelectric PbHfO ₃ by synchrotron radiation

Hideshi Fujishita, Yuya Ishikawa, Akira Ogawaguchi, Kenichi Kato, Eiji Nishibori, Masaki Takata, Makoto Sakata

Research output: Contribution to journal › Article

13 Citations (Scopus)

Abstract

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 PbZrO ₃, though the direction of the disorder in PbHfO₃ was not so obvious as that in PbZrO₃.

Original language	English
Pages (from-to)	2743-2747
Number of pages	5
Journal	journal of the physical society of japan
Volume	74
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.74.2743
Publication status	Published - 2005 Oct 1
Externally published	Yes

Keywords

Antiferroelectrics
Order parameter
PbHfO
Phenomenological theory
Spontaneous strain
Structure

ASJC Scopus subject areas

Physics and Astronomy(all)

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Fujishita, H., Ishikawa, Y., Ogawaguchi, A., Kato, K., Nishibori, E., Takata, M., & Sakata, M. (2005). A study of structures and order parameters in antiferroelectric PbHfO ₃ by synchrotron radiation. journal of the physical society of japan, 74(10), 2743-2747. https://doi.org/10.1143/JPSJ.74.2743

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title = "A study of structures and order parameters in antiferroelectric PbHfO 3 by synchrotron radiation",

abstract = "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 PbZrO 3, though the direction of the disorder in PbHfO3 was not so obvious as that in PbZrO3.",

keywords = "Antiferroelectrics, Order parameter, PbHfO, Phenomenological theory, Spontaneous strain, Structure",

author = "Hideshi Fujishita and Yuya Ishikawa and Akira Ogawaguchi and Kenichi Kato and Eiji Nishibori and Masaki Takata and Makoto Sakata",

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T1 - A study of structures and order parameters in antiferroelectric PbHfO 3 by synchrotron radiation

AU - Fujishita, Hideshi

AU - Ishikawa, Yuya

AU - Ogawaguchi, Akira

AU - Kato, Kenichi

AU - Nishibori, Eiji

AU - Takata, Masaki

AU - Sakata, Makoto

PY - 2005/10/1

Y1 - 2005/10/1

N2 - 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 PbZrO 3, though the direction of the disorder in PbHfO3 was not so obvious as that in PbZrO3.

AB - 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 PbZrO 3, though the direction of the disorder in PbHfO3 was not so obvious as that in PbZrO3.

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KW - Phenomenological theory

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