DOI: 10.1063/1.4938124. Huge low-frequency dielectric response of (Nb,In)-doped TiO2 ceramics

Huge low-frequency dielectric response of (Nb,In)-doped TiO2 ceramics

10.1063/1.4938124

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

The (Nb,In)-doped TiO2 ceramics have drawn considerable attention as a type of promising giant-permittivity dielectric materials in recent years. However, a significant controversy concerning the giant dielectric mechanism currently exists, and clarifying it is vitally important from both scientific and technological viewpoints. This letter reports the results of a systematical comparison study, where two kinds of (Nb,In)-doped TiO2 ceramics with a substantial difference in dielectric loss are used. Dielectric properties and complex impedance are investigated over a broad frequency band of 3 mHz–110 MHz. A huge low-frequency dielectric response in addition to the giant dielectric relaxation appearing above 1 MHz is observed for both kinds of (Nb,In)-doped TiO2 ceramics in dielectric dispersion. The huge dielectric response observed in the low frequency range can be ascribed to a non-ohmic electrode-contact, and the dielectric relaxation appearing above 1 MHz can be attributed to an internal barrier layer capacitance effect. An electrical equivalent circuit model suggested can well describe the observed dielectric properties and electrical behaviors.

Bibliography

Wu, Y. Q., Zhao, X., Zhang, J. L., Su, W. B., & Liu, J. (2015). Huge low-frequency dielectric response of (Nb,In)-doped TiO2 ceramics. Applied Physics Letters, 107(24).

Authors 5

Y. Q. Wu (first)
X. Zhao (additional)
J. L. Zhang (additional)
W. B. Su (additional)
J. Liu (additional)

References 24 Referenced 115

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10.1002/1521-4095(20020916)14:18<1321::AID-ADMA1321>3.0.CO;2-P / Adv. Mater. (2002)
10.1063/1.1463211 / Appl. Phys. Lett. (2002)
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Dates

Type	When
Created	9 years, 8 months ago (Dec. 17, 2015, 1:17 p.m.)
Deposited	2 years, 2 months ago (June 17, 2023, 7:05 p.m.)
Indexed	3 weeks, 1 day ago (Aug. 5, 2025, 8:17 a.m.)
Issued	9 years, 8 months ago (Dec. 14, 2015)
Published	9 years, 8 months ago (Dec. 14, 2015)
Published Online	9 years, 8 months ago (Dec. 17, 2015)
Published Print	9 years, 8 months ago (Dec. 14, 2015)

Funders 2

The Specialized Researcg Fund for the Doctoral Program of Higher Education
Awards1
1. 20130131110006
National Natural Science Foundation of China 10.13039/501100001809
Region: Asia
gov (National government)
Labels11
1. Chinese National Science Foundation
2. Natural Science Foundation of China
3. National Science Foundation of China
4. NNSF of China
5. NSF of China
6. 国家自然科学基金委员会
7. National Nature Science Foundation of China
8. Guójiā Zìrán Kēxué Jījīn Wěiyuánhuì
9. NSFC
10. NNSF
11. NNSFC
Awards1
1. 51172128

BibTeX

@article{Wu_2015, title={Huge low-frequency dielectric response of (Nb,In)-doped TiO2 ceramics}, volume={107}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.4938124}, DOI={10.1063/1.4938124}, number={24}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Wu, Y. Q. and Zhao, X. and Zhang, J. L. and Su, W. B. and Liu, J.}, year={2015}, month=dec }

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