Hopping conductance in nanocomposites (Fe(0.45)Co(0.45)Zr(0.10))(x)(Al(2)O(3))(1-x) manufactured by ion-beam sputtering of complex target in Ar+O(2) Ambient Gas
Artykuł w czasopiśmie
MNiSW
15
Lista A
| Status: | |
| Autorzy: | Kołtunowicz Tomasz, Żukowski Paweł, Fedotova Vera V., Saad Anis M., Fedotov Aleksander K. |
| Rok wydania: | 2011 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 1 |
| Wolumen/Tom: | 120 |
| Strony: | 39 - 42 |
| Web of Science® Times Cited: | 32 |
| Scopus® Cytowania: | 24 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| We report the investigation of a real part of the admittance sigma of granular nanocomposites (Fe(0.45)Co(0.45)Zr(0.10))(x)(Al(2)O(3))(1-x) with 0.30 < x < 0.70 in the dielectric (hopping) regime. An analysis of the sigma(T, f, x) dependences in the as-deposited and annealed films over the temperature 77 K < T < 300 K and frequency 50 < f < 10(6) Hz ranges displayed the predominance of an activation (hopping) conductance mechanism with d sigma/dT > 0 for the samples below the percolation threshold x(C) approximate to 0.76 +/- 0.05. Based on the earlier models for hopping AC conductance, computer simulation of the frequency coefficient alpha(f) of hopping conductance depending on the probability of jump p, frequency f, and also on the shape of sigma(f) curve was performed. The experimental and simulation results revealed a good agreement. |
