Novel Pr-Cu magnetic phase at low temperature in PrBa2Cu3O6+x observed by neutron diffraction

A.T. Boothroyd, A. Longmore, N.H. Andersen, E. Brecht, T. Wolf

    Research output: Contribution to journalJournal articleResearch


    We have studied by neutron diffraction the magnetic ordering in Al-free crystals of PrBa2Cu3O6+x (x = 0.35 and 0.92) that do not display the AFII Cu magnetic phase. Wt find that the Pr ordering below 20 K is accompanied by a counterrotation of the Cu antiferromagnetism on each plane of the bilayer. The maximum turn angle between the two planes is 60 degrees +/- 9 degrees for the x = 0.92 crystal, and 40 degrees +/- 11 degrees for the x = 0.35 crystal. This is the first observation of a noncollinear ordering of Cu moments in the bilayer, and is evidence for significant magnetic coupling between the Cu and Pr sublattices.
    Original languageEnglish
    JournalPhysical Review Letters
    Issue number1
    Pages (from-to)130-133
    Publication statusPublished - 1997


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