Interdependence of magnetism and superconductivity in the borocarbide TmNi2B2C

K. Nørgaard, M.R. Eskildsen, N.H. Andersen, J. Jensen, P. Hedegaard, S.N. Klausen, P.C. Canfield

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We have discovered anew antiferromagnetic phase in TmNi2B2C by neutron diffraction. The ordering vector is Q(A) = (0.48,0,0) and the phase appears shove a critical in-plans magnetic field of 0.9 T. The field was applied in order to test the assumption that the zero-field magnetic structure at Q(F) = (0.094, 0.094, 0) would change into a c-axis ferromagnet if superconductivity were destroyed. We present theoretical calculations which show that two effects are important a suppression of the ferromagnetic component of the RKKY exchange interaction in the superconducting phase and a reduction of the superconducting condensation energy due to the periodic modulation of the moments at Q(A).
    Original languageEnglish
    JournalPhysical Review Letters
    Volume84
    Issue number21
    Pages (from-to)4982-4985
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2000

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