Spin dynamics of the Kondo insulator CeNiSn approaching the metallic phase

A. Schröder, G. Aeppli, T.E. Mason, E. Bucher

    Research output: Contribution to journalJournal articleResearch

    Abstract

    The spin dynamics of Kondo insulators has been studied by high-resolution magnetic neutron spectroscopy at a triple-axes spectrometer on CeNi1-xCuxSn single crystals using a vertical 9 T magnet. While upon doping (x = 0.13) the spin gap of the Kondo insulator CeNiSn collapses at the transition to an antiferromagnetic ordered metallic Kondo compound, no such instability is observed in CeNiSn in magnetic fields up to 9 T. Both the sharp magnetic excitations (at 2 and 4 meV) appear significantly broader for energy and momentum transfer at high fields, while the ground-state correlations (probed by chi'(0)) remain unaffected by the magnetic field.
    Original languageEnglish
    JournalPhysica B: Condensed Matter
    Volume234/236
    Pages (from-to)861-863
    ISSN0921-4526
    DOIs
    Publication statusPublished - 1997

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