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Onset of spontaneous electrostrictive strain below 520 K in Pr-doped SrTiO3

Physical Review B 78(9): -

Autoren/Herausgeber: Ranjan R
Garg R
Hackl R
Senyshyn A
Schmidbauer E
Trots D
Boysen H
Erschienen: 2008

Sr0.95Pr0.05TiO3 ceramic is shown to exhibit anomalous value of cubic lattice parameter at room temperature. A combination of temperature dependent dielectric and synchrotron x-ray powder-diffraction study has revealed that the anomalous lattice parameter has contribution from spontaneous electrostrictive strain that sets in below 520 K. In analogy with the lead-based classical relaxor ferroelectrics, it is suggested that Pr-doped SrTiO3 is a new class of high-temperature lead-free relaxor ferroelectric system.

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