Local and electronic structures of NaNbO3, AgNbO3, and KNbO3
- 2 September 2024
- journal article
- research article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 63 (9) , 09SP12
Abstract
NaNbO3, AgNbO3, and KNbO3 with ABO3-type perovskite systems are known to possess good ferroelectric properties. In their traditional average structure, a change in the A-site ion size changes the involved tolerance factor. Herein, we directly determined the rattling space of each atom through local structure analysis. By combining a pair distribution function and an extended X-ray absorption fine structure, this analysis revealed that the bonding sites with large fluctuations varied with varying ion sizes. Experimental evidence including soft X-ray absorption spectroscopy, indicates that the A-site ions are hybridized with oxygen.Keywords
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