The relation between the local and the average structure of rhombohedral ferroelectric PbHf0.9Ti0.1O3

N. Sicron; E. A. Stern; Y. Yacoby

doi:10.1016/S0022-3697(99)00288-7

The relation between the local and the average structure of rhombohedral ferroelectric PbHf_0.9Ti_0.1O₃

N. Sicron^*
, E. A. Stern
, Y. Yacoby

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

The local structure of the rhombohedral perovskite PbHf_0.9Ti_0.1O₃ was studied using Pb, Hf and Ti X-ray absorption fine structure (XAFS). XAFS data were analyzed by fitting a parameterized theoretical spectrum to the experimental data. It was found that the structure of the TiO₆ octahedron is very different from the structure of the HfO₆ octahedron. Furthermore, the PbO and Pb-Pb bonds have very large Debye-Waller factors indicating that Pb and O atoms are disordered about the rhombohedral positions down to 11 K. Despite the structural disorder, the local structure of PbHf_0.9Ti_0.1O₃ resembles the rhombohedral average structure more than the structure of PbHfO₃ or PbTiO₃. Since PbHf_1-xTiO₃ and PbZr_1-xTiO₃ have very similar phase diagrams, it is reasonable to assume that the same structural features characterize rhombohedral PbZr_1-xTi_xO₃.

Original language	English
Pages (from-to)	243-249
Number of pages	7
Journal	Journal of Physics and Chemistry of Solids
Volume	61
Issue number	2
DOIs	https://doi.org/10.1016/S0022-3697(99)00288-7
State	Published - 2000
Event	Proceedings of the 1999 Williamsburg Workshop on Ferroelectrics - Williamsburg, VA, United States Duration: 31 Jan 1999 → 3 Feb 1999

Keywords

D. Ferroelectricity
Structural disorder

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10.1016/S0022-3697(99)00288-7

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title = "The relation between the local and the average structure of rhombohedral ferroelectric PbHf0.9Ti0.1O3",

abstract = "The local structure of the rhombohedral perovskite PbHf0.9Ti0.1O3 was studied using Pb, Hf and Ti X-ray absorption fine structure (XAFS). XAFS data were analyzed by fitting a parameterized theoretical spectrum to the experimental data. It was found that the structure of the TiO6 octahedron is very different from the structure of the HfO6 octahedron. Furthermore, the PbO and Pb-Pb bonds have very large Debye-Waller factors indicating that Pb and O atoms are disordered about the rhombohedral positions down to 11 K. Despite the structural disorder, the local structure of PbHf0.9Ti0.1O3 resembles the rhombohedral average structure more than the structure of PbHfO3 or PbTiO3. Since PbHf1-xTiO3 and PbZr1-xTiO3 have very similar phase diagrams, it is reasonable to assume that the same structural features characterize rhombohedral PbZr1-xTixO3.",

keywords = "D. Ferroelectricity, Structural disorder",

author = "N. Sicron and Stern, \{E. A.\} and Y. Yacoby",

year = "2000",

doi = "10.1016/S0022-3697(99)00288-7",

language = "אנגלית",

volume = "61",

pages = "243--249",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Ltd.",

number = "2",

note = "Proceedings of the 1999 Williamsburg Workshop on Ferroelectrics ; Conference date: 31-01-1999 Through 03-02-1999",

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TY - JOUR

T1 - The relation between the local and the average structure of rhombohedral ferroelectric PbHf0.9Ti0.1O3

AU - Sicron, N.

AU - Stern, E. A.

AU - Yacoby, Y.

PY - 2000

Y1 - 2000

N2 - The local structure of the rhombohedral perovskite PbHf0.9Ti0.1O3 was studied using Pb, Hf and Ti X-ray absorption fine structure (XAFS). XAFS data were analyzed by fitting a parameterized theoretical spectrum to the experimental data. It was found that the structure of the TiO6 octahedron is very different from the structure of the HfO6 octahedron. Furthermore, the PbO and Pb-Pb bonds have very large Debye-Waller factors indicating that Pb and O atoms are disordered about the rhombohedral positions down to 11 K. Despite the structural disorder, the local structure of PbHf0.9Ti0.1O3 resembles the rhombohedral average structure more than the structure of PbHfO3 or PbTiO3. Since PbHf1-xTiO3 and PbZr1-xTiO3 have very similar phase diagrams, it is reasonable to assume that the same structural features characterize rhombohedral PbZr1-xTixO3.

AB - The local structure of the rhombohedral perovskite PbHf0.9Ti0.1O3 was studied using Pb, Hf and Ti X-ray absorption fine structure (XAFS). XAFS data were analyzed by fitting a parameterized theoretical spectrum to the experimental data. It was found that the structure of the TiO6 octahedron is very different from the structure of the HfO6 octahedron. Furthermore, the PbO and Pb-Pb bonds have very large Debye-Waller factors indicating that Pb and O atoms are disordered about the rhombohedral positions down to 11 K. Despite the structural disorder, the local structure of PbHf0.9Ti0.1O3 resembles the rhombohedral average structure more than the structure of PbHfO3 or PbTiO3. Since PbHf1-xTiO3 and PbZr1-xTiO3 have very similar phase diagrams, it is reasonable to assume that the same structural features characterize rhombohedral PbZr1-xTixO3.

KW - D. Ferroelectricity

KW - Structural disorder

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VL - 61

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EP - 249

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 2

T2 - Proceedings of the 1999 Williamsburg Workshop on Ferroelectrics

Y2 - 31 January 1999 through 3 February 1999

ER -

The relation between the local and the average structure of rhombohedral ferroelectric PbHf_0.9Ti_0.1O₃

Abstract

Keywords

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