Effect of Annealing on the Electrical and Magnetic Properties of Ni-SiO2 Multilayer Nanocomposites
Artykuł w czasopiśmie
MNiSW
100
Lista 2024
| Status: | |
| Autorzy: | Wilczyńska Aleksandra, Łakomski Mateusz, Ruta Łukasz |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 16 |
| Wolumen/Tom: | 16 |
| Numer artykułu: | 1033 |
| Strony: | 1 - 23 |
| Impact Factor: | 4,8 |
| Scopus® Cytowania: | 0 |
| Bazy: | Scopus |
| Efekt badań statutowych | NIE |
| Finansowanie: | The work was mainly funded by the Department of Semiconductor and Optoelectronic Devices of the Lodz University of Technology. The research presented in the article was performed at a measurement station financed by the Lublin University of Technology program titled “Investing in Potential” (grant no.: 19/IP/2025/F) and the Scientific Discipline Council for Automatic Control, Electronics, Electrical Engineering and Space Technologies at the Lublin University of Technology (grant no.: FD-20/EE-2/327). |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 20 sierpnia 2026 |
| Abstrakty: | angielski |
| This study investigates the influence of annealing on the electrical, magnetoresistive, and structural properties of Ni–SiO2 nanocomposites fabricated by magnetron sputtering. Electrical measurements performed over the frequency range of 4 Hz to 1 MHz and at temperatures between 298 and 333 K revealed that charge transport in the structures is dominated by hopping conduction described by the Mott and Jonscher models. Before annealing, the nanocomposite exhibited behavior characteristic of a system near the percolation threshold, while thermal treatment at 673 K for 30 min significantly reduced conductivity and increased activation energy, indicating reorganization of conductive pathways and increased separation between active centers. Phase angle analysis confirmed the coexistence of resistive and capacitive components, associated with Maxwell–Wagner–Sillars interfacial polarization. Magnetoresistance measurements demonstrated a transition from negative magnetoresistance in the non-annealed sample to positive magnetoresistance after annealing, suggesting a change from spin-dependent scattering to tunneling-dominated transport mechanisms. Electric and magnetic field simulations were carried out, which showed that the magnetic field was uniformly distributed throughout the structure. SEM observations confirmed a granular morphology with increased intergrain separation after annealing, EDS analysis indicated no significant increase in oxidation. The obtained results demonstrate that annealing strongly modifies transport and magnetic properties of Ni–SiO2 nanocomposites, making them promising materials for magnetoelectronic applications. |
