Annealing characteristics and calcium doping effects in the superconducting Pb2CuSr2[Eu1-xCax]Cu 2O8+δ system

T. Karlemo*, M. Karppinen, L. Niinistö, J. Lindén, M. Lippmaa

*Tämän työn vastaava kirjoittaja

    Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

    6 Sitaatiot (Scopus)

    Abstrakti

    Essentially single-phase samples of Pb2CuSr2[Eu1-xCax]Cu 2O8+δ have been investigated in a compositional range of x = 0.0-0.3. Annealing characteristics in oxygen and nitrogen atmospheres were systematically monitored by thermogravimetric measurements. Activation energies were determined for both the oxygen uptake and loss processes. The effect of Ca doping on the critical temperature was studied, and the Tc was found to be quite independent of the Ca content. The highest value of Tc = 74 K was measured for the sample of x = 0.25. The hyperfine parameters of the Eu site were determined by 151Eu Mössbauer spectroscopy. The asymmetry parameter η of the electric field gradient showed a clear dependence on both x and δ.

    AlkuperäiskieliEnglanti
    Sivut225-232
    Sivumäärä8
    JulkaisuPhysica C: Superconductivity and its Applications
    Vuosikerta292
    Numero3-4
    DOI - pysyväislinkit
    TilaJulkaistu - 20 joulukuuta 1997
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Sormenjälki Sukella tutkimusaiheisiin 'Annealing characteristics and calcium doping effects in the superconducting Pb<sub>2</sub>CuSr<sub>2</sub>[Eu<sub>1-x</sub>Ca<sub>x</sub>]Cu <sub>2</sub>O<sub>8+δ</sub> system'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

    Viittausmuodot