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Lattice stability of nickel titanate under high pressure up to 30.3 GPa

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  • Wenming Qi

    (Xinjiang University
    Xinjiang University)

  • Anwar Hushur

    (Xinjiang University
    Xinjiang University)

Abstract

Studying the lattice stability of ilmenite-type compounds under extreme conditions such as high temperature and high pressure is of great significance both for understanding the intrinsic mechanism of structural transformations between various forms of ABO3 compounds and for guiding the design of functional materials. Herein, lattice transformations of ilmenite-type compounds represented by nickel titanate (NiTiO3) have been studied by using in-situ high-pressure Raman spectroscopy up to 30.3 GPa for the first time. No phase transitions have been observed in the studied pressure range. However, our data clearly show a structural distortion in the local cationic octahedron-NiO6 of NiTiO3 starting at 15 GPa, which has resulted from the pressure-induced Jahn–Teller effect. Our data also indicate the ilmenite structure NiTiO3 to become more symmetrical under high pressure, and we did not find any amorphization up to 30.3 GPa. This research provides basic information on the ilmenite NiTiO3 structure that it is more stable than other analog ilmenite structures previously studied by other researchers. Graphical abstract

Suggested Citation

  • Wenming Qi & Anwar Hushur, 2022. "Lattice stability of nickel titanate under high pressure up to 30.3 GPa," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 95(2), pages 1-7, February.
    • Handle: RePEc:spr:eurphb:v:95:y:2022:i:2:d:10.1140_epjb_s10051-022-00291-3
    DOI: 10.1140/epjb/s10051-022-00291-3
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