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

Ranjan, Rajeev ; Garg, Rohini ; Hackl, Rudi ; Senyshyn, Anatoliy ; Schmidbauer, Elmar ; Trots, Dmytro ; Boysen, Hans (2008) Onset of spontaneous electrostrictive strain below 520 K in Pr-doped SrTiO3 Physical Review B: Condensed Matter and Materials Physics, 78 (9). ISSN 1098-0121

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Official URL: http://doi.org/10.1103/PhysRevB.78.092102

Related URL: http://dx.doi.org/10.1103/PhysRevB.78.092102

Abstract

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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