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X-ray spectroscopy of EuBa/sub 2/(Cu/sub 1-//sub y/Zn/sub y/)/sub 3/O/sub 7-//sub x/: Suppression of superconductivity

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)

We have studied the x-ray-absorption near-edge spectra of EuBa/sub 2/(Cu/sub 1-//sub y/Zn/sub y/)/sub 3/O/sub 7/ as a function of Zn and O content. There is clear evidence for the development of Cu/sup 1+/ ions as the O content is reduced to levels sufficient to suppress superconductivity. However, there is no effect on the electronic state of the Cu ion as the Zn content is increased and superconductivity vanishes. We tentatively conclude that the suppression of superconductivity is in both cases due to the preferred occupancy of certain planes by nonmagnetic (filled d subshell) atoms, as proposed in YBa/sub 2/Cu/sub 3/O/sub 6/ on the basis of neutron scattering.

Research Organization:
Physics Department, New York University, 4 Washington Place, New York, New York 10003
OSTI ID:
6866059
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:4; ISSN PRBMD
Country of Publication:
United States
Language:
English