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Giant Dielectric Permittivity Observed in Li and Ti Doped NiO
Abstract
A giant low-frequency dielectric constant ( epsilon 0 approximately 10(5)) near room temperature was observed in Li,Ti co-doped NiO ceramics. Unlike currently best-known high epsilon 0 ferroelectric-related materials, the doped oxide is a nonperovskite, lead-free, and nonferroelectric material. It is suggested that the giant dielectric constant response of the doped NiO could be enhanced by a grain boundary-layer mechanism as found in boundary-layer capacitors. In addition, there is about a one-hundred-fold drop in the dielectric constant at low temperature. This anomaly is attributed to a thermally excited relaxation process rather than a thermally driven phase transition, as for that yielding ferroelectrics.
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Cited by
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Hu, W., Liu, Y., Withers, R. L., Frankcombe, T. J., Norén, L., Snashall, A., Kitchin, M., Smith, P., Gong, B., Chen, H., et al. (2013) · Nature Materials · doi:10.1038/nmat3691 · Cited by 1,117
Mao, J., Shuai, J., Song, S., Wu, Y., Dally, R., Zhou, J., Liu, Z., Sun, J., Zhang, Q., dela Cruz, C., et al. (2017) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1711725114 · Cited by 373
Colossal Permittivity Materials as Superior Dielectrics for Diverse Applications
Wang, Y., Jie, W., Yang, C., Wei, X., & Hao, J. (2019) · Advanced Functional Materials · doi:10.1002/adfm.201808118 · Cited by 283
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Metadata
- Authors
- Wu, J., Nan, C.-W., Lin, Y., & Deng, Y.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2002-10-30
- Volume
- 89
- Issue
- 21
- Pages
- 217601-217601
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2090329884
- Cited by
- 725
- References
- 0
- FWCI
- 7.25
- Type
- journal article
- Language
- en
- Open access
- closed
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- Wu, J., Nan, C.-W., Lin, Y., & Deng, Y. (2002). Giant Dielectric Permittivity Observed in Li and Ti Doped NiO. Physical Review Letters. https://doi.org/10.1103/physrevlett.89.217601
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