Coupled magnetic excitations in single crystal PrBa2Cu3O6.2

S.J.S. Lister, A.T. Boothroyd, N.H. Andersen, B.H. Larsen, A.A. Zhokhov, A.N. Christensen, A.R. Wildes

    Research output: Contribution to journalJournal articleResearchpeer-review


    The dispersion of the low-energy magnetic excitations of the Pr sublattice in PrBa2Cu3O6.2 is determined by inelastic neutron scattering measurements on a single crystal. The dispersion, which shows the effect of interactions with the Cu spin waves, is well described by a model of the coupled Cu-Pr magnetic system. This model enables values for the principal exchange constants to be determined. The results suggest that both Pr-Pr and Cu-Pr interactions are important in producing the anomalously high ordering temperature of the Pr sublattice. Measurements of the Cu optic spin wave mode show that the interlayer Cu-Cu exchange is significantly lower than in YBa2Cu3O6.2.
    Original languageEnglish
    JournalPhysical Review Letters
    Issue number26
    Pages (from-to)5994-5997
    Publication statusPublished - 2001


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