Frequency and temperature impact on the electrical properties of LaCr0.99Pd0.01O3-ẟ compound

• Published in: Journal of materials science. Materials in electronics 2020-09, Vol.31 (18), p.15407-15421
• Main Authors: Coskun, M., Polat, O., Sobola, D., Konečný, M., Coskun, F. M., Durmus, Z., Caglar, M., Öcal, A. K., Turut, A.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemical composition; Chemical synthesis; Chemistry and Materials Science; Electrical properties; Electrical resistivity; Frequency ranges; Investigations; Materials Science; Optical and Electronic Materials; Oxidation; X ray photoelectron spectroscopy
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-020-04104-0

The LaCr 0.99 Pd 0.01 O 3 compound has been synthesized with solid-state reaction method. The microstructure, crystalline structure, chemical composition, and oxidation states of elements were investigated via SEM, Raman and XPS analysis techniques. SEM has revealed that particles have various sizes. XPS investigation has unveiled the oxidation states of La (3+), Pd (4+), and Cr (both 3+ and 6+). Electrical characterization has been performed in nitrogen ambient using Novocontrol Dielectric Spectrometer. Real and imaginary parts of the dielectric function, impedance, modulus, and conductivity of studied compound were investigated in wide temperature and frequency range. The activation energy from the log f max vs. ( kT ) −1 and log σ dc vs. ( kT ) −1 plots has been obtained as 0.240 eV and 0.231 eV, respectively. It has been demonstrated that the correlated barrier hopping (CBH) and non-overlapping small polaron tunneling (NSPT) conductions take place in the LaCr 0.99 Pd 0.01 O 3 compound.