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VOLUME 47 (1988) | ISSUE 4 | PAGE 196
Proof of the metallic nature of the chemical bond and coexistence of magnetism and superconductivity in the Y1-xFexBa2Cu3Oδ system (0<x<0.5)
Superconducting transitions have been observed intheYl_x Fqx Ba2Cu305 system at ;t<0.3. In the interval 0.1 <л;<0,3, a magnetic ordering of the Fe atoms in the "copper sublattice" is observed to coexist with a superconductivity. It has been established that all the cations in the 1-2-3 phase have a metallic chemical bond, so it is meaningless to discuss their valence states.