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- Title
Evidence for Vogel Fulcher behavior of the 50K-relaxation in (Tm+Ta) co-doped TiO2 ceramics.
- Authors
Li, Tianyu; Cao, Wenjun; Zhang, Yingtang; Wang, Chunchang
- Abstract
There is still no consensus about the relaxation behavior of the so-called 50 K-relaxation in acceptor and donor co-doped TiO2 system. Herein, the relaxation behavior of the 50 K-relaxation was investigated in (Tm + Ta) co-doped rutile TiO2 ceramics. Dielectric properties of the sample were studied in the temperature range of 2–300 K under 100 frequencies in the range of 102–106 Hz. The sample shows a pronounced 50 K-relaxation. Various relaxation behaviors of Arrhenius, Mott's variable range hopping, and Vogel Fulcher laws were tried to describe the relaxation. The result indisputably evidences that the 50 K-relaxation follows the Vogel Fulcher law. This work provides a heuristic hint to understand the fundamental physics underlying the colossal permittivity behavior in the acceptor and donor co-doped TiO2 ceramics system.
- Subjects
DOPING agents (Chemistry); TITANIUM dioxide; DIELECTRIC properties; PERMITTIVITY; DIELECTRIC relaxation; CERAMICS; RUTILE
- Publication
Modern Physics Letters B, 2024, Vol 38, Issue 24, p1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984924501987