Effects of intercalation of Br and Li into Bi2Sr2Can-1CunO2n+4 (n = 1, 2, 3) have been investigated. For Bi-intercalated samples of n = 2 and 3, intercalation compounds Bi2Sr2Can-1CunO2n+4Br with enlarged unit cells along the c-axis are synthesized. For Li-intercalated samples, it is not clear whether Li atoms act as intercalants or oxygen getters. For lightly Br- and Li-intercalated samples, the electrical resistivity, the Hall coefficient and Tc change depending on the quantity of intercalants, which is attributable to charge transfer between intercalants and CuO2 planes. For n = 3, Tc decreases by the intercalation of both Br and Li, suggesting that Bi2Sr2Ca2Cu3O10 has almost optimum hole concentration to attain the maximum of Tc. In conclusion, the intercalation is effective for controlling the carrier concentration in CuO2 planes.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering