Observation of a field-driven structural phase transition in the flux line lattice in ErNi2B2C

M.R. Eskildsen, P.L. Gammel, B.P. Barber, U. Yaron, A.P. Ramirez, D.A. Huse, D.J. Bishop, C. Bolle, C.M. Lieber, S. Oxx, S. Sridhar, N.H. Andersen, K. Mortensen, P.C. Canfield

    Research output: Contribution to journalJournal articleResearch

    Abstract

    Small-angle neutron scattering and magnetic decoration both demonstrate a topological transition in the flux line lattice (FLL) in ErNi2B2C. The high-field square lattice slowly transforms into a hexagonal lattice via an area preserving [100] rhombohedral distortion below roughly 500 Oe. The square FLL is aligned with the [110] direction of the tetragonal crystal, while the two domains of the hexagonal FLL are aligned with [100] and [010]. The differences in pinning for the two FLL topologies are reflected in the rf kinetic inductance.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume78
    Issue number10
    Pages (from-to)1968-1971
    ISSN0031-9007
    DOIs
    Publication statusPublished - 1997

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