Akademik Veri Yönetim Sistemi
Nano-Structures and Nano-Objects, cilt.46, 2026 (Scopus)
Pt-doped Cu0.25Zn0.25Co0.25Ni0.25Pt3xFe2–4xO4 (0.00 ≤ x ≤ 0.10) nanospinel ferrites (Pt→CuZnCoNi (x ≤ 0.10) NSFs) were achieved via One Pot Sol–gel method. The phase formation and morphology were investigated by X-ray powder diffraction (XRD), Scanning electron microscopy (SEM) linked with EDX. The electrical and dielectric properties of (Pt→CuZnCoNi (x ≤ 0.10) NSFs) were systematically investigated. The study focused on the AC and DC conductivity, dielectric loss and dielectric constant as functions of frequency, temperature, and platinum (Pt) concentration. An increase in Pt content was found to enhance both AC and DC conductivity, which is attributed to the creation of oxygen vacancies, changes in the Fe3 + /Fe2+ ratio, and improved hopping mechanisms. The DC conductivity measurements showed a thermally activated small polaron hopping conduction mechanism, with the activation energy (E a ) decreasing as the Pt concentration increased. The analysis of AC conductivity revealed that the materials' behavior is frequency-dependent and suggests suitability for high-frequency applications. Koop's phenomenological theory and the Maxwell-Wagner model effectively characterize the dielectric properties and the dielectric constant decreased with increasing frequency. Pt substitution reduces energy dissipation by minimizing dielectric loss and suppressing relaxation peaks. The dielectrics possess tailored characteristics that indicate they can be used for high frequency electronics, EMI shielding, Magnetic Sensors, and Data Storage.