The Meyer-Neldel rule in amorphous TiO2 films with different Fe content
JOURNAL OF MATERIALS RESEARCH, cilt.27, sa.17, ss.2271-2277, 2012 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 27 Sayı: 17
- Basım Tarihi: 2012
- Doi Numarası: 10.1557/jmr.2012.193
- Dergi Adı: JOURNAL OF MATERIALS RESEARCH
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.2271-2277
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
Amorphous titania thin films with increasing Fe content have been prepared by RF magnetron sputtering. X-ray absorption spectroscopy revealed modifications of both local structures/environment of the Ti and Fe atoms, with formation of phases containing amorphous material and a magnetite-like phase. The temperature dependence of the electrical conductivity of the films was investigated for temperatures higher than half of the Debye temperature (T > 391 K). It was found that the electrical conductivity in the amorphous Fe/TiO2 films obeys the Meyer-Neldel rule. The origin of this behavior is explained on the basis of the multiphonon-assisted hopping model.