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A comparative Brillouin-scattering study of the broad doublet and acoustic phonons in isotopically substituted SrTi( 18 O 1Ϫx 16 O x ) 3 and ''pure'' SrTi 16 O 3 crystals is presented. The acoustic-phonon frequency is found to decrease as a result of the substitution, but the doublet spectra above 20 K show no obvious differences. The results are examined in connection with the second-sound interpretation of the doublet. Influence of the phase transition on the doublet spectra is discussed.

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Brillouin and Raman scattering study of the isotopically induced ferroelectric phase transition of SrTi18O3

Yagi

Kasahara

Tsujimi

et al. 2002

Physica B: Condensed Matter

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R. Wang

Ferroelectricity Induced by Oxygen Isotope Exchange in Strontium Titanate Perovskite

Pressure as a probe of the physics of18O-substitutedSrTiO3

Brillouin-scattering study of the broad doublet in isotopically exchangedSrTiO3

Brillouin and Raman scattering study of the isotopically induced ferroelectric phase transition of SrTi18O3

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