Abstract
The structural parameters of a nonsuperconductor (Pr0.6Sr0.4)(Pr0.75Ce0.25)CuO4-z(z=0.012) were refined by the Rietveld analysis of TOF neutron powder diffraction data. It is isomorphous with a superconductor (Nd1-xSrx)(Nd1-yCey)CuO4-zand consists of K2NiF4- and Nd2CuO4-type units stacked alternately along the c-axis. An apical oxygen site in the K2NiF4unit is 1.2% deficient. Pr atoms in the Nd2CuO4unit are, at least partially, in the oxidation state +4. The origin of nonsuperconductivity in this compound is discussed from a crystal chemical point of view.
Original language | English |
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Pages (from-to) | L1803-L1806 |
Journal | Japanese Journal of Applied Physics |
Volume | 29 |
Issue number | 10 |
DOIs | |
Publication status | Published - Oct 1990 |
Externally published | Yes |
Keywords
- (PrSr)(PrCe)CuO
- Mixed valency
- Neutron powder diffraction
- Nonstoichiometry
- Rietveld analysis
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)