Figure of merit of a europium type 1:2:3 superconductor compound

G.M. González, R. Rodríguez-Mijangos, G. Vázquez-Polo


In this work we evaluate the potentialities of the compound EuBa$_{2}$Cu$_{3}$O$_{7-\delta}$ for thermoelectric applications by showing the curves of thermoelectric figure of merit versus temperatures at different oxygen concentrations. Today those kinds of data are not accessible in current literature for these types of compounds. The curves indicate that the best figure of merit corresponds to a sample with an electric conductivity related to a de-oxygenation parameter $\delta=0.7$, when the material is not in a superconducting state (tetragonal phase). For this oxygen concentration, the values achieved for the electrical conductivity, together with data of thermoelectric power and thermal conductivity, are acceptable for starting a search in thermoelectric applications, which allow us to suppose a possible basement to improve the figure of merit in this compound.


Thermoelectric figure of merit; Thermoelectric effects of superconductors; Ceramic superconductor materials

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REVISTA MEXICANA DE FÍSICA, year 67, issue 2, March-April 2021. Bimonthly Journal published by Sociedad Mexicana de Física, A. C. Departamento de Física, 2º Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510 , Ciudad de México. Apartado Postal 70-348. Tel. (+52)55-5622-4946,, e-mail: Chief Editor: José Alejandro Ayala Mercado. INDAUTOR Certificate of Reserve: 04-2019-080216404400-203, ISSN: 2683-2224 (on line), 0035-001X (print), both granted by Instituto Nacional del Derecho de Autor. Responsible for the last update of this issue, Technical Staff of Sociedad Mexicana de Física, A. C., Fís. Efraín Garrido Román, 2º. Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510 , Ciudad de México. Date of last modification, March 1st., 2021.

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