Articles
A study of the structural, magnetic, and electrical properties of Ba1-xNaxCoO3 compounds (x = 0.25, 0.5, 0.75)
Carlos Augusto Estrada-Rodriguez- Lutiene Fernandes-Lopes
- Rovan Fernandes-Lopes
- Fabiano Mesquita
- Águeda Maria Turatti
- Jorge Luiz Pimentel-Junior
- Santiago Sandoval-Gutierrez
- Carlos Arturo Parra Vargas
Published 2021-08-02
Keywords
- X-ray diffraction,
- paramagnetic,
- order magnetic,
- metal-insulator transition,
- resistivity
How to Cite
Estrada-Rodriguez, C. A., Fernandes-Lopes, L., Fernandes-Lopes, R., Mesquita, F., Turatti, Águeda M., Pimentel-Junior, J. L., Sandoval-Gutierrez, S., & Parra Vargas, C. A. (2021). A study of the structural, magnetic, and electrical properties of Ba1-xNaxCoO3 compounds (x = 0.25, 0.5, 0.75). Revista UIS Ingenierías, 20(4), 127–134. https://doi.org/10.18273/revuin.v20n4-2021010
Abstract
Cobaltite-like materials having metal-insulator transitions are relevant in the consumer electronics market. In this work, we present the structural, magnetic, and electrical properties of Ba1-xNaxCoO3 (with x = 0.25, 0.5, 0.75) cobaltite. All samples were synthesized using a solid-state reaction process. Their crystal structure was determined using X-ray diffraction (XRD) data by the Rietveld method, which showed that all the samples were crystallized in the orthorhombic space group C2221 (N.° 20). The microstructure of the sintered samples was characterized by scanning electron microscopy (SEM). The magnetic susceptibility measurements confirmed a paramagnetic behavior for x ≥ 0.5 in the temperature range that was used. Likewise, a broad peak around 33 K in the sample x = 0.25, and characteristic of antiferromagnetic behaviors were observed. On the other hand, resistivity contributed to determining the insulating behavior of samples where x = 0.5 and x = 0.75. In contrast, at low sodium content (x = 0.25), a metal-insulator transition was observed with transition temperature near 105 K.
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References
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[18] P. Mandal, P. Choudhury, S. K. Biswas, B. Ghosh, “Transport and magnetic properties of La1-xBaxCoO3,” Physical Review B, vol. 70, no. 10, pp. 104407, 2004. doi: 10.1103/PhysRevB.70.104407.
[19] K. Muta, Y. Kobayashi, K. Asai, “Magnetic, Electronic Transport, and Calorimetric Investigations of La1-xCaxCoO3 in Comparison with La1-xSrxCoO3,” Journal of the Physical Society of Japan, vol. 71, no. 11, pp. 2784-2791, 2002, doi: 10.1143/JPSJ.71.2784.
[20] D. Kaur, K. V. Rao, “Metal-insulator transition in epitaxial thin films of BaRuO3,” Journal of Physics D: Applied Physics, vol. 36, no. 2, pp. 156, 2002, doi: 10.1088/0022-3727/36/2/313.