Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article The Temperature Dependence of Elastic Constants and Zener Anisotropy in Single Crystal KTaO3 Below Room Temperature(Pleiades Publishing Ltd, 2025) Li, C. H.; Ding, X. D.; Carpenter, M. A.; Aktas, O.We present the first experimental report of the complete elastic tensor of incipient ferroelectric KTaO3 between 9.6 and 307 K, using resonant ultrasound spectroscopy (RUS). The elastic constants C-11 and C-44, as well as the bulk and shear moduli increase roughly linearly upon cooling. Deviations from such dependence are a result of impurities. Zener anisotropy factor is 0.697 at room temperature and decreases to 0.627 at 9.6 K, indicating increasing elastic anisotropy. The temperature dependence of C-12 is anomalous with no stiffening on cooling, which could be a result of different defect species influencing C-12 but not the other constants, possibly due to defect anisotropy. The values of elastic constants and anisotropy are compared at room temperature and below 10 K with the literature reporting experimental results and density functional theory calculations.