Substitutions of 3-d Transition Metal Ions for Copper in Bi2Sr2Ca(n-1)Cu(n)O(2n+4).

摘要

Transition metal substitutions in YBa2Cu3O)7 have contributed to an understanding of the dominant role of copper-oxide planes versus the copper-oxide chains in that material. Since the pairing of carriers in the Cu-O2 planes is responsible for high temperature superconductivity in all copper-oxide ceramics, it is of interest to alter the electronic structure of, as well as to introduce magnetic impurities into, the CuO2 planes. The 3-d transition elements were chosen because their valences and ionic radii suggest that they might substitute for the Cu in these materials. Reprints. (JES)