INVESTIGADORES
SERQUIS Adriana Cristina
artículos
Título:
Oxygen non-stoichiometry of Nd1.85Ce0.15Cu1+δOy as a function of δ and its relation with the superconducting properties
Autor/es:
F. PRADO; A. SERQUIS; A. CANEIRO
Revista:
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 1997 vol. 48 p. 1027 - 1038
ISSN:
1388-6150
Resumen:
Thermogravimetric measurements of the equilibrium oxygen partial pressure (Po2) as a function of the oxygen content y were performed on Nd1.85Ce0.15Cu1+δOy samples with controlled Cu contents (1+δ=1.00, 1.01 and 1.02) at 1173 and 1237 K. The data obtained showed a dependence of the oxygen non-stoichiometry on the nominal Cu content. These measurements are discussed in terms of the presence of Cu defects in the T′ structure. The superconducting response of this material in samples with controlled oxygen and Cu contents was also studied. The superconducting response was found to be very sensitive to the presence of small amounts of cationic and anionic defects.
