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- W3184298741 abstract "The phenomenon of relaxor ferroelectrics is studied through detailed Raman spectroscopy on polycrystalline Sr1-xPrxTiO3 (x = 0.01–0.17) samples. The polar mode was observed up to very high temperature ~1000 K indicating presence of dipoles well above the characteristic relaxor temperatures and they develop a short range correlation at 505 K leading to formation of PNRs. Below 505 K, the TO2 polar mode anomalously soften along with Fano resonance and changes in the octahedral tilt angle. This establishes growth of local polar order associated with local structural phase transition at T ~505 K. The local TiO6 octahedral tilt scales with the intensity of the polar mode and hence can be used as an order parameter for relaxor transition. It is shown that the paraelectric to relaxor ferroelectric phase transition in this compound is random polarizability instability driven phenomenon which has been correlated with the local octahedral tilt angle." @default.
- W3184298741 created "2021-08-02" @default.
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- W3184298741 date "2021-11-01" @default.
- W3184298741 modified "2023-09-29" @default.
- W3184298741 title "Fano resonance and relaxor behavior in Pr doped SrTiO3: A Raman spectroscopic investigation" @default.
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- W3184298741 doi "https://doi.org/10.1016/j.physb.2021.413265" @default.
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