Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/65172
Type: Artigo de periódico
Title: ELECTROCHEMICAL INTERCALATION OF O2- IN LA2CUO4 SINGLE-CRYSTALS
Author: SANCHEZ, RD
TORRESI, RM
RETTORI, C
OSEROFF, S
FISK, Z
Abstract: 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 approximate to 10(-16) cm(2) S-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.
Subject: SUPERCONDUCTIVITY
LA2CUO4 SINGLE CRYSTAL
ELECTROCHEMICAL INTERCALATION
DIFFUSION PROCESSES
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Rights: fechado
Identifier DOI: 10.1016/0013-4686(94)00283-7
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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