Negative capacitance in (FeCoZr)-(PZT) nanocomposite films
Artykuł w czasopiśmie
MNiSW
35
Lista A
| Status: | |
| Autorzy: | Kołtunowicz Tomasz, Fedotova Julia A., Żukowski Paweł, Saad Anis M., Fedotov Aleksander K., Kasiuk Julia V., Larkin Andrei V. |
| Rok wydania: | 2013 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 12 |
| Wolumen/Tom: | 46 |
| Numer artykułu: | 125304 |
| Impact Factor: | 2,521 |
| Web of Science® Times Cited: | 45 |
| Scopus® Cytowania: | 40 |
| Bazy: | Web of Science | Scopus | Web of Science Core Collection |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| In this work, attention was focused on the inductive contribution to the real part of admittance G(T, f) in (Fe0.45Co0.45Zr0.10)(x)(PZT)((1-x)) nanocomposite films deposited in a mixed argon-oxygen atmosphere. The observed G(x, f, T) dependences for the films on the dielectric side of the insulator-metal transition demonstrated the negative capacitance (NC) effect that was maximal for the nanocomposites with 0.40 < x < 0.60, where the metallic FeCoZr nanoparticles were totally oxidized. The NC effect was explained by a specially developed model for the ac hopping conductance of the electrons between the fully oxidized nanoparticles embedded in the PZT matrix. In accordance with the model, under the determined conditions the observed structure of nanocomposites led to an increase in the hopping electron mean lifetime on nanoparticles and hence to the possibility of positive angles of the phase shifts theta and a proper NC (inductive-like contribution) effect. |
