Electrical Transport and Thermal Properties of NdBa1 –xMgxFeCo0.5Cu0.5O5 +δ (0.00 ≤ x ≤ 0.40) Solid Solutions

• Published in: Glass physics and chemistry Vol. 49; no. 1; pp. 57 - 62
• Main Authors: Chizhova, E. A., Klyndyuk, A. I., Zhuravleva, Ya. Yu, Shevchenko, S. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.02.2023; Springer Nature B.V
• Subjects: Barium; Carrier density; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Current carriers; Electrical resistivity; Glass; High temperature; Magnesium; Materials Science; Mathematical analysis; Natural Materials; Oxygen; Oxygen content; P-type semiconductors; Perovskites; Physical Chemistry; Solid solutions; Thermal expansion; Thermal stability; Thermodynamic properties; Transport properties; Unit cell; layered perovskites; thermal stability; electrical conductivity; thermal expansion; thermo-EMF
• ISSN: 1087-6596; 1608-313X
• DOI: 10.1134/S1087659622600910

NdBa 1 – x Mg x FeCo 0.5 Cu 0.5 O 5 + δ (0.00 ≤ x ≤ 0.40) double perovskites are synthesized by the ceramic method and their structure, oxygen nonstoichiometry (δ), and thermal and electrical transport properties are studied. NdBa 1 – x Mg x FeCo 0.5 Cu 0.5 O 5 + δ compounds have a tetragonal structure (space group P 4/ mmm ) and are semiconductors of the p -type, whose electrical conductivity characteristics at elevated temperatures changes to metal-like characteristics due to the release of oxygen from the samples (δ). The partial replacement of barium with magnesium in NdBaFeCo 0.5 Cu 0.5 O 5 + δ leads to a decrease in the oxygen content (δ) in the solid solutions formed in this case, an increase in the size of their unit cell and the thermo-EMF coefficient, and a decrease in the thermal stability, linear thermal expansion coefficient, and electrical conductivity. The values of electrical transport energy, weighted mobility, and concentration of charge carriers in the studied materials are calculated.