Magnetic Excitations and Magnetic Ordering in Praseodymium

Jens Christian Gylden Houmann, M. Chapellier, A. R. Mackintosh, Poul Erik Bak, O. D. McMasters, K. A. Gschneider Jr.

    Research output: Contribution to journalJournal articleResearchpeer-review


    The dispersion relations for magnetic excitons propagating on the hexagonal sites of double-hcp Pr provide clear evidence for a pronounced anisotropy in the exchange. The energy of the excitations decreases rapidly as the temperature is lowered, but becomes almost constant below about 7 K, in agreement with a random-phase-approximation calculation. No evidence of magnetic ordering has been observed above 0.4 K, although the exchange is close to the critical value necessary for an antiferromagnetic state.
    Original languageEnglish
    JournalPhysical Review Letters
    Issue number10
    Pages (from-to)587-5890
    Publication statusPublished - 1975

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