INVESTIGADORES
SERQUIS Adriana Cristina
artículos
Título:
Synthesis method, control of cationic composition and superconducting behavior of Nd1.85Ce0.15Cu1±δOy
Autor/es:
A SERQUIS; A. CANEIRO; F. PRADO
Revista:
PHYSICA C - SUPERCONDUTIVITY
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 1995 vol. 253 p. 339 - 350
ISSN:
0921-4534
Resumen:
Samples of Nd1.85Ce0.15Cu1 ± °Oy (0.99 ≤ ± δ ≤ 1.02) were prepared by a solid-state reaction (SSR), nitrate-decomposition method (NDM) and liquid-mix method (LMM) and characterized by XRD, SEM, EPMA, DTA and DC magnetization. The control of Cu content, substitutional impurities and Ce homogeneity depends on the synthesis method, which modifies the microstructure and the superconducting behavior of these materials. Our results show that in Nd1.85Ce0.15Cu1 ± δOy small variations of δ strongly affect the superconducting properties. For 1 + δ > 1.00 the Meissner fraction and the superconducting transition are substantially improved.
