Improvement in superconductivity of TlBa2CaCu2Oy system by introduction of oxygen loss

S. Nakajima, M. Kikuchi, Y. Syono, K. Nagase, T. Oku, N. Kobayashi, D. Shindo, K. Hiraga

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)


    The Tc and oxygen content of TlBa2CaCu2Oy have been investigated by quenching experiments, in which the heat-treated samples were dropped into liquid nitrogen. The oxygen loss, v, of TlBa2CaCu2Oyo - v was determined by thermogravimetry in a nitrogen atmosphere using an oxygen-annealed specimen of TlBa2CaCu2Oyo and also by measurements of the weight differences before and after quenching. Tc increased from 80 K of the oxygen-annealed specimen up to about 110 K with increasing oxygen loss up to v = 0.035 by annealing at 500°C in a nitrogen atmosphere. Judging from the high Tc above 110 K achieved by a small oxygen loss about v = 0.035, the as-sintered oxygen-annealed TlBa2CaCu2Oyo specimen was in the over-doping state and probably has an oxygen vacancy of 7 - yo0.

    Original languageEnglish
    Pages (from-to)443-447
    Number of pages5
    JournalPhysica C: Superconductivity and its applications
    Issue number5-6
    Publication statusPublished - 1990 Oct 1

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering


    Dive into the research topics of 'Improvement in superconductivity of TlBa2CaCu2Oy system by introduction of oxygen loss'. Together they form a unique fingerprint.

    Cite this