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|Type:||Artigo de periódico|
|Title:||ELECTROCHEMICAL INTERCALATION OF O2- IN LA2CUO4 SINGLE-CRYSTALS|
|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.|
LA2CUO4 SINGLE CRYSTAL
|Editor:||Pergamon-elsevier Science Ltd|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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