Compensation effect in an exchange enhanced superconductor: [(La.993Lu.007)1-xGdx]Ru2

T. E. Jones, E. P. Chock, P. M. Chaikin

    Research output: Contribution to journalArticle

    Abstract

    We have measured the upper critical field, Hc2, of alloys of the form [(La.993Lu.007)1-xGdx]Ru2. For large (x{greater-than or approximate}0.02) concentrations of Gd, the critical fields are re-entrant. For small (x{less-than or approximate}0.01) concentrations of Gd, the critical fields cross the pure sample critical fields and rise above them due to compensation of the externally applied magnetic field by the negative effective internal field of the magnetic impurity. Compensation occurs at relatively low fields (25 KG) in this system as a result of substantial exchange enhancement. From the concentration and critical field of the most compensated sample, we find a value for the exchange integral, J(0) = -(15+-2) meV, and a susceptibility enhancement factor in excellent agreement with EPR, specific heat and static susceptibility measurements.

    Original languageEnglish (US)
    Pages (from-to)635-638
    Number of pages4
    JournalSolid State Communications
    Volume20
    Issue number7
    DOIs
    StatePublished - Nov 1976

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    ASJC Scopus subject areas

    • Chemistry(all)
    • Condensed Matter Physics
    • Materials Chemistry

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