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Isostructural phase transition in Tb2Ti2O7 under pressure and temperature: Insights from synchrotron X-ray diffraction

Das, S and Mahatha, SK and Glazyrin, K and Ganesan, R and Elizabeth, S and Chakraborty, T (2024) Isostructural phase transition in Tb2Ti2O7 under pressure and temperature: Insights from synchrotron X-ray diffraction. In: Solid State Communications, 377 .

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Official URL: https://doi.org/10.1016/j.ssc.2023.115396


Tb2Ti2O7, a pyrochlore system, has garnered significant interest due to its intriguing structural and physical properties and their dependence on external physical parameters. In this study utilizing high-brilliance synchrotron X-ray diffraction, we conducted a comprehensive investigation of structural evolution of Tb2Ti2O7 under external pressure and temperature. We have conclusively confirmed the occurrence of an isostructural phase transition beyond the pressure of 10 GPa. The transition exhibits a distinct signature in the variation of lattice parameters under pressure and leads to changes in mechanical properties. The underlying physics driving this transition can be understood in terms of localized rearrangement of atoms while retaining the overall cubic symmetry of the crystal. Notably, the observed transition remains almost independent of temperature. Our findings offer insights into the distinctive behaviour of the isostructural phase transition in Tb2Ti2O7. © 2023

Item Type: Journal Article
Publication: Solid State Communications
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to Elsevier Ltd.
Keywords: Crystal symmetry; Synchrotron radiation; Temperature; Titanium compounds; X ray diffraction, High-pressure XRD; Isostructural; Isostructural phase transition; Low-temperature XRD; Lows-temperatures; Pressure and temperature; Pyrochlores; Structural phase transition; Synchrotron XRD; XRD, Terbium compounds
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 27 Feb 2024 09:12
Last Modified: 27 Feb 2024 09:12
URI: https://eprints.iisc.ac.in/id/eprint/83613

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