Browsing by Author "Punetha, P"

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    Interplay of local polarization, ionic size, and octahedral tilt in SrTiO3-Na0.5Bi0.5TiO3
    (American Physical Society (APS), 2024-01-01) Sharma, D; Punetha, P; Adhikary, GD; Avdeev, M; Ranjan, R
    We show that the ferroelectric system (1−x) SrTiO3−(x) Na0.5Bi0.5TiO3 exhibits an interesting interplay of local polarization, ionic size effect, and octahedral tilt. This interplay results in (i) a nonmonotonic composition dependence of the lattice volume at room temperature and (ii) existence of a unique temperature (300∘C) at which the competing effects of electrostriction caused by the formation of polar nanoregions and geometrical ionic size make the system exhibit composition independent lattice parameters in a large composition interval x<0.40. ©2024 American Physical Society.