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Vasylechko L, Stepchuk R, Prots Y, et al. Concentration- and Temperature-Induced Phase Transitions in PrAlO3-SrTiO3 System. Nanoscale Res Lett. 2016;11(1):17doi: 10.1186/s11671-015-1225-4.
Vasylechko, L., Stepchuk, R., Prots, Y., & Rosner, H. (2016). Concentration- and Temperature-Induced Phase Transitions in PrAlO3-SrTiO3 System. Nanoscale research letters, 11(1), 17. https://doi.org/10.1186/s11671-015-1225-4
Vasylechko, Leonid, et al. "Concentration- and Temperature-Induced Phase Transitions in PrAlO3-SrTiO3 System." Nanoscale research letters vol. 11,1 (2016): 17. doi: https://doi.org/10.1186/s11671-015-1225-4
Vasylechko L, Stepchuk R, Prots Y, Rosner H. Concentration- and Temperature-Induced Phase Transitions in PrAlO3-SrTiO3 System. Nanoscale Res Lett. 2016 Dec;11(1):17. doi: 10.1186/s11671-015-1225-4. Epub 2016 Jan 13. PMID: 26759353; PMCID: PMC4710631.
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Nanoscale Res Lett. 2016 Dec;11(1):17. doi: 10.1186/s11671-015-1225-4. Epub 2016 Jan 13.

Concentration- and Temperature-Induced Phase Transitions in PrAlO3-SrTiO3 System.

Nanoscale research letters

Leonid Vasylechko, Roman Stepchuk, Yuri Prots, Helge Rosner

Affiliations

  1. Lviv Polytechnic National University, 12 Bandera Street, 79013, Lviv, Ukraine. [email protected].
  2. Lviv Polytechnic National University, 12 Bandera Street, 79013, Lviv, Ukraine. [email protected].
  3. Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187, Dresden, Germany. [email protected].
  4. Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187, Dresden, Germany. [email protected].

PMID: 26759353 PMCID: PMC4710631 DOI: 10.1186/s11671-015-1225-4

Abstract

Single-phase mixed aluminates-titanates Pr1-x Sr x Al1-x Ti x O3 (x = 0.1, 0.2, 0.3, 0.5, 0.7) with rhombohedral perovskite structure were prepared by solid-state reaction technique at 1823-1873 K. Morphotropic rhombohedral-to-cubic phase transition in Pr1-x Sr x Al1-x Ti x O3 series is predicted to occur at x = 0.88. The temperature-induced structural phase transition R  [Formula: see text]  с - Pm [Formula: see text]  m in Pr0.5Sr0.5Al0.5Ti0.5O3, detected at 930 K by in situ high-temperature X-ray synchrotron powder diffraction, occurs at considerably lower temperature as the corresponding transformation in the parent compound PrAlO3 (1770 K). Such remarkable drop of the transition temperature is explained by gradual decrease of the perovskite structure deformation in the Pr1-x Sr x Al1-x Ti x O3 series with increasing Sr and Ti contents as a consequence of the increasing Goldschmidt tolerance factor. For Pr0.3Sr0.7Al0.3Ti0.7O3 phase, a sequence of the low-temperature phase transformation R  [Formula: see text]  с - Immb(C2/m) - I4/mcm was detected.

Keywords: Crystal structure; Perovskite aluminates and titanates; Phase transitions; Solid solution

References

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