Li Doping into the Bi-2212 Phase by Electrochemical Method

Masashi Fujiwara; Mokoto Nakanishi; Totsuo Fujii; Jun Takada; Yoshihiro Kusano; Yosuo Takeda; Yasunori Ikeda; Mikio Takano; Yoshichika Bando

doi:10.2497/jjspm.44.142

Masashi Fujiwara, Mokoto Nakanishi, Totsuo Fujii, Jun Takada, Yoshihiro Kusano, Yosuo Takeda, Yasunori Ikeda, Mikio Takano, Yoshichika Bando

Author information

Masashi Fujiwara
Department of Applied Chemistry, Faculty of Engineering, Okayama University
Mokoto Nakanishi
Department of Applied Chemistry, Faculty of Engineering, Okayama University
Totsuo Fujii
Department of Applied Chemistry, Faculty of Engineering, Okayama University
Jun Takada
Department of Applied Chemistry, Faculty of Engineering, Okayama University
Yoshihiro Kusano
College of Arts, Kurashiki University of Science and the Arts
Yosuo Takeda
Department of Chemistry, Faculty of Engineering, Mie University
Yasunori Ikeda
Institute for Chemical Research, Kyoto University
Mikio Takano
Institute for Chemical Research, Kyoto University
Yoshichika Bando
Institute for Chemical Research, Kyoto University

Keywords: 2212 phase, electrochemical reaction, Li-doping, lattice parameter, Tc

JOURNAL OPEN ACCESS

1997 Volume 44 Issue 2 Pages 142-146

DOI https://doi.org/10.2497/jjspm.44.142

Details

Abstract

The effects of electrochemical Li-doping on superconducting properties of the Bi-2212 phase have been investigated. The electrochemical Li-doping into the 2212 phase was first succeed with remaining the original crystal structure and without formation of any second phase. Maximum Li content y as Li_yBi₂Sr_1.5Ca_1.5Cu₂O_z by this electrochemical reaction was found to be 0.37. The Li content increased with increasing in reaction time and applied potential. The lattice parameters (a, c) of the Bi-2212 crystals increased continuously from (5.397Å, 30.69Å) for y=0.0 to (5.411Å, 30.89Å) for y=0.37. Tc of the doped samples continuously decreased to OK for around y=0.27.

Corresponding author

Register with J-STAGE for free!