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Mode softening, precursor phenomena, and intermediate phases in PbZrO3

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Bussmann-Holder,  A.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Electronic Structure Theory (Ali Alavi), Max Planck Institute for Solid State Research, Max Planck Society;
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Ko, J. H., Gorny, M., Majchrowski, A., Roleder, K., & Bussmann-Holder, A. (2013). Mode softening, precursor phenomena, and intermediate phases in PbZrO3. Physical Review B, 87(18): 184110.


Cite as: https://hdl.handle.net/21.11116/0000-000E-C62B-3
Abstract
Single crystals of PbZrO3 have been studied by Brillouin light scattering, birefringence, and piezoelectric coefficient measurements. The structural phase transition at T-c is shown to be related to the softening of a longitudinal acoustic (LA) mode, whereas precursor effects are deduced from a central peak in the light scattering spectrum, finite birefringence, and piezoelectric coefficient above the structural instability. An intermediate phase in the vicinity of T-c is apparent where a coexistence of the LA mode with a high frequency mode appears, and in addition the transverse acoustic (TA) mode becomes visible.