INVESTIGADORES
SANCHEZ Rodolfo Daniel
artículos
Título:
Electrochemical intercalation of O2− in La2CuO4 single crystals
Autor/es:
R.D. SÁNCHEZ; R.M. TORRESI; C. RETTORI; S.B. OSEROFF; Z. FISK
Revista:
ELECTROCHIMICA ACTA
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 1995 vol. 40 p. 209 - 212
ISSN:
0013-4686
Resumen:
The electrochemical intercalation of oxygen in La2CuO4 single crystals was studied using electron paramagnetic resonance and magnetic susceptibility measurements. Chronoamperometric experiments showed that, in the intercalation process, the O2− diffusion in single crystals is extremely slow (D ≈ 1016cm2s−1). This diffusion coefficient depends strongly on temperature and the enthalpy diffusion was found to be ca. 750 kJ deg−1 mol−1. Crystals under electro-oxidation for one to two weeks still show the presence of the antiferromagnetic and a superconducting phases. This was supported by the simultaneous observation of line splitting in the EPR spectra and superconducting diamagnetic signal.
