Ionic transport and dielectric properties in NaNbO3 under high pressure
- 9 October 2017
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 111 (15)
- https://doi.org/10.1063/1.4999206
Abstract
The ionic transport and dielectric behaviors in NaNbO3 were studied under pressures up to 29.1 GPa by in situ impedance spectroscopy measurements. The transport process consists of the ionic transfer and the Warburg diffusion process between sample/electrode diffusion layers. A dielectric relaxation with a giant dielectric constant at low frequencies is observed, which is attributed to the “Maxwell-Wagner” interfacial polarization. In the Pbcm phase, the increase in the interaction between the Na+ ions and the NbO6 octahedra results in the enhancement of vibration resonance damping. In the high-pressure phases, the decrease in the relative permittivity with pressure indicates the existence of space charge polarization of the interface layer besides the ionic polarization.Funding Information
- National Natural Science Foundation of China (11604133,61775089,61275147,11374121 and 11404133)
- Industrial Alliance Fund of Shandong Provincial Key Laboratory (SDKL2016038)
- Initial Foundation for Doctor Program of Liaocheng University (318051610 and 318051612)
- Special Construction Project Fund of Shandong Province Taishan Scholars
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