Helimagnetic structures in epitaxial Nd/Y superlattices and alloys

B.A. Everitt, M.B. Salamon, J.A. Borchers, R.W. Erwin, J.J. Rhyne, B.J. Park, K.V. O'Donovan, D.F. McMorrow, C.P. Flynn

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    Abstract

    The complex magnetic structure of Nd exhibits a new magnetic phase when grown epitaxially, either as a stabilized double hexagonal close-packed alloy, or as part of a Nd/Y superlattice. In the alloy and in those superlattices with small Nd/Y ratios, the incommensurate b axis modulated structure exhibited by elemental Nd at T-N = 19.9 K is absent. In its place, incommensurate helimagnetic order, similar to that in dilute yttrium alloys of the heavy lanthanides, appears below approximately 30 K. Evidence for coherent propagation of the magnetic spiral through the Y spacers is observed in some Y-rich superlattices. As the Nd:Y ratio in the superlattices is increased, the b axis modulated phases reappear and coexist with the helical phase. Thick epitaxial Nd films, nevertheless, exhibit only bulklike magnetic structure. We discuss these observations in terms of band structure modifications.
    Original languageEnglish
    JournalPhysical Review B
    Volume56
    Issue number9
    Pages (from-to)5452-5460
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1997

    Cite this

    Everitt, B. A., Salamon, M. B., Borchers, J. A., Erwin, R. W., Rhyne, J. J., Park, B. J., O'Donovan, K. V., McMorrow, D. F., & Flynn, C. P. (1997). Helimagnetic structures in epitaxial Nd/Y superlattices and alloys. Physical Review B, 56(9), 5452-5460. https://doi.org/10.1103/PhysRevB.56.5452