Structural studies of Sr2GaSbO6, Sr 2NiMoO6, and Sr2FeNbO6 using pressure and temperature

Michael W. Lufaso, René B. MacQuart, Yongjae Lee, Thomas Vogt, Hans Conrad Zur Loye

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Results from high-pressure synchrotron x-ray diffraction and high-temperature x-ray diffraction measurements on polycrystalline samples of the tetragonal perovskites Sr2GaSbO6, Sr 2NiMoO6, and Sr2FeNbO6 are reported. A phase transition, where the unit cell changes symmetry from tetragonal to cubic, is observed for each compound at elevated temperatures. The phase transition changes the structure from one exhibiting an octahedral tilting distortion at ambient temperature to one that is untilted above the transition temperature. At elevated pressures the lattice parameter ratio increases, indicating that the magnitude of the octahedral tilting distortion is increasing as a function of pressure. In the pressure range studied, up to ∼6 GPa, no phase transitions were observed.

Original languageEnglish
Article number008
Pages (from-to)8761-8780
Number of pages20
JournalJournal of Physics Condensed Matter
Volume18
Issue number39
DOIs
Publication statusPublished - 2006 Oct 4

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Phase transitions
x ray diffraction
Diffraction
perovskites
X rays
Temperature
ambient temperature
temperature
lattice parameters
synchrotrons
Synchrotrons
transition temperature
Superconducting transition temperature
Lattice constants
symmetry
cells

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Lufaso, Michael W. ; MacQuart, René B. ; Lee, Yongjae ; Vogt, Thomas ; Zur Loye, Hans Conrad. / Structural studies of Sr2GaSbO6, Sr 2NiMoO6, and Sr2FeNbO6 using pressure and temperature. In: Journal of Physics Condensed Matter. 2006 ; Vol. 18, No. 39. pp. 8761-8780.
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abstract = "Results from high-pressure synchrotron x-ray diffraction and high-temperature x-ray diffraction measurements on polycrystalline samples of the tetragonal perovskites Sr2GaSbO6, Sr 2NiMoO6, and Sr2FeNbO6 are reported. A phase transition, where the unit cell changes symmetry from tetragonal to cubic, is observed for each compound at elevated temperatures. The phase transition changes the structure from one exhibiting an octahedral tilting distortion at ambient temperature to one that is untilted above the transition temperature. At elevated pressures the lattice parameter ratio increases, indicating that the magnitude of the octahedral tilting distortion is increasing as a function of pressure. In the pressure range studied, up to ∼6 GPa, no phase transitions were observed.",
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Structural studies of Sr2GaSbO6, Sr 2NiMoO6, and Sr2FeNbO6 using pressure and temperature. / Lufaso, Michael W.; MacQuart, René B.; Lee, Yongjae; Vogt, Thomas; Zur Loye, Hans Conrad.

In: Journal of Physics Condensed Matter, Vol. 18, No. 39, 008, 04.10.2006, p. 8761-8780.

Research output: Contribution to journalArticle

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T1 - Structural studies of Sr2GaSbO6, Sr 2NiMoO6, and Sr2FeNbO6 using pressure and temperature

AU - Lufaso, Michael W.

AU - MacQuart, René B.

AU - Lee, Yongjae

AU - Vogt, Thomas

AU - Zur Loye, Hans Conrad

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AB - Results from high-pressure synchrotron x-ray diffraction and high-temperature x-ray diffraction measurements on polycrystalline samples of the tetragonal perovskites Sr2GaSbO6, Sr 2NiMoO6, and Sr2FeNbO6 are reported. A phase transition, where the unit cell changes symmetry from tetragonal to cubic, is observed for each compound at elevated temperatures. The phase transition changes the structure from one exhibiting an octahedral tilting distortion at ambient temperature to one that is untilted above the transition temperature. At elevated pressures the lattice parameter ratio increases, indicating that the magnitude of the octahedral tilting distortion is increasing as a function of pressure. In the pressure range studied, up to ∼6 GPa, no phase transitions were observed.

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