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American Physical Society, Physical review B, 17(70), 2004

DOI: 10.1103/physrevb.70.172103

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Antiferroelectric phase transition inSr9In(PO4)7

Journal article published in 2004 by S. Y.-U. Stefanovich, A. A. Belik, M. Azuma ORCID, M. Takano, O. V. Baryshnikova ORCID, V. A. Morozov, B. I. Lazoryak, O. I. Lebedev, G. Van Tendeloo
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This paper is available in a repository.

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Abstract

High-temperature second-harmonic-generation, x-ray powder diffraction, dielectric, differential scanning calorimetry, and structural data are presented to show that Sr9In(PO4)(7) exhibits an antiferroelectric (AFE) phase transition of the second order at 773+/-3 K. Sr9In(PO4)(7) complements a group of Ca-3(VO4)(2)-type ferroelectric phosphates and vanadates and is the first example of an AFE material in this family. Structural data obtained for the AFE and the paraelectric phase of Sr9In(PO4)(7) show evidence that both displacive and order-disorder contributions are responsible for the physical properties of the Ca-3(VO4)(2)-type materials.