Author/Authors :
Abatal, M mabatal@pampano.unacar.mx , Quiroz, A Facultad de Ingeniería - Universidad Autónoma del Carmen - Cd del Carmen - Campeche, México , Diaz-Mendez, S Facultad de Ingeniería - Universidad Autónoma del Carmen - Cd del Carmen - Campeche, México , Alazki, H Facultad de Ingeniería - Universidad Autónoma del Carmen - Cd del Carmen - Campeche, México , Gonzalez-Parada, A University of Guanajuato - León, México , García-Vázquez, V Instituto de Física Luis Rivera Terrazas - Benemérita Universidad Autónoma de Puebla - Puebla, México , Chavira, E Instituto de Investigaciones en Materiales - UNAM - México - Cd. Mx., México
Abstract :
The superconducting properties of the RuSr2GdCu2O8 ceramic system depend strongly on the synthesis conditions
and the ionic substitutions. In this work, we studied the structural and electrical properties of the Ru0.9M0.1Sr2GdCu
2O8 system, with M = Zr, Mo, and Mn. The samples were prepared by solid-state reaction at ambient pressure in
air, using temperatures between 980 °C and 1020 °C. X-ray powder diffraction patterns indicated that all samples
crystallized in a tetragonal symmetry (S.G. P4/mmm, No. 123). The structural data of each sample was rened by the
Rietveld method, showing that the Cu-O (1) and Ru-O (1) bond lengths varies with the substituted ionic radii of Zr, Mo,
and Mn ions. Electrical resistance measurements indicated that the samples annealed in owing oxygen at 1050 °C
and 1055 °C for 5 days exhibit a semiconductor like behavior for M = Mo and Mn, whereas the samples with M = Zr
and Ru show superconductivity behavior.
