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  • 1
    Electronic Resource
    Electronic Resource
    Non-s-wave behavior of c-axis aligned Pr1.85Ce0.15CuO3.97 superconducting powder (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 7660-7662 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The tetragonal c-axis alignment of Tc=23 K Pr1.85Ce0.15CuO3.97 superconducting powder was achieved in a 1 T alignment field with rotating powder/epoxy holder perpendicular to the alignment field. The in-plane penetration depth λab for this electron-doped superconductor was derived using zero-field-cooled Meissner diamagnetic data with low applied field (Ba〈Hc1ab) parallel to the c-axis aligned powder. A small Pr paramagnetic contribution was subtracted. The temperature dependence of Δλab(T)=λab(T)−λab(0) [with λab(0)∼133 nm] up to ∼0.5 Tc can be fitted well with a non-s-wave or d-wave-like power law Δλab(T)=AT2+CT4, where the T2 law is dominated at low temperature. The present result agrees with recent phase-sensitive experiment, which indicates d-wave nature for these electron-doped 214 cuprates. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1356052
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic properties of high-oxygen pressure prepared PrBa2Cu3O7−y cuprates (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 7484-7486 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: High oxygen pressure annealed PrBa2Cu3O7−y (y∼0) cuprates were prepared in order to study the effect of oxygen stoichiometric parameter y on the unusual Pr/Cu magnetic properties and/or recently reported superconductivity. The oxygen-rich orthorhombic 123-chain phase is highly unstable under high-oxygen pressure synthesis and decomposes completely in 10 bar pressure. For a smaller 2 bar prepared sample a relatively clean phase was preserved with an oxygen parameter y=0.05, as compared with y=0.11 from a conventional 1 bar flowing oxygen method. No superconductivity can be detected for all high-oxygen pressure prepared samples. Instead, Mott-insulator behavior with anomalous high Pr ordering TN(Pr)=19 K was observed for PrBa2Cu3O6.95. Comparison with other Pr/Ba intersubstituted Pr1−xBa2−xCu3O7−y cuprates is discussed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1357859
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  • 3
    Electronic Resource
    Electronic Resource
    Anomalous Pr Ordering and Structural Analysis for Oxygenated Tetragonal 1212 Compound Pr1.5Ba1.5Cu3O7.2 (1999)
    Springer
    Journal of low temperature physics 117 (1999), S. 885-889 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Magnetic measurement and powder X-ray Rietveld analysis are performed on oxygenated Pr 1.5 Ba 1.5 Cu 3 O 7.2 cuprate. This tetragonal compound with lattice parameters a = 0.38916 nm and c = 1.16177 nm is found to form the TlBa 2 CaCu 2 O 7 1212-type structure when written as Cu[Ba 1.5 Pr 0.5 ]PrCu 2 O 7.2. Low temperature magnetic data indicate that anomalous Pr order temperature T N (Pr) decreases from 18 K for orthorhombic PrBa 2 Cu 3 O 6.9 to 10.5 K for Pr 1.5 Ba 1.5 Cu 3 O 7.2. The increasing Pr-O bond length with decreasing T N indicates that Pr ordering is closely correlated with the wave function overlap between Pr-4f orbital and O-2p π orbital in the CuO 2 bi-layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022546723142
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