ELECTROCHEMICAL INTERCALATION OF O2- IN LA2CUO4 SINGLE-CRYSTALS

被引：18
作者：
SANCHEZ, RD
TORRESI, RM
RETTORI, C
OSEROFF, S
FISK, Z
机构：
[1] UNIV CAMPINAS,INST FIS GLEB WATAGHIN,BR-13083970 CAMPINAS,BRAZIL
[2] SAN DIEGO STATE UNIV,DEPT PHYS,SAN DIEGO,CA 92182
[3] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545
来源：
ELECTROCHIMICA ACTA | 1995年 / 40卷 / 02期
基金：
巴西圣保罗研究基金会;
关键词：
SUPERCONDUCTIVITY; LA2CUO4 SINGLE CRYSTAL; ELECTROCHEMICAL INTERCALATION; DIFFUSION PROCESSES;
D O I：
10.1016/0013-4686(94)00283-7
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
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.
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收藏
页码：209 / 212
页数：4
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