Magnetic ordering in electronically phase-separated La2-xSrxCuO4+y: Neutron diffraction experiments

Linda Udby, Niels Hessel Andersen, F.C. Chou, Niels Bech Christensen, S.B. Emery, Kim Lefmann, J.W. Lynn, H.E. Mohottala, Ch. Niedermayer, B.O. Wells

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    Abstract

    We present results of magnetic neutron diffraction experiments on the codoped superoxygenated La2-xSrxCuO4+y (LSCO+O) system with x=0.09. We find that the magnetic phase is long-range ordered incommensurate antiferromagnetic with a Neacuteel temperature T-N coinciding with the superconducting ordering temperature T-c=40 K. The incommensurability value is consistent with a hole doping of n(h)approximate to 1>8 but in contrast to nonsuperoxygenated La2-xSrxCuO4 with hole doping close to n(h)approximate to 18 the magnetic-order parameter is not field dependent. We attribute this to the magnetic order being fully developed in LSCO+O as in the spin and charge ordered "stripe" compounds La1.48Nd0.40Sr0.12CuO4 and La7/8Ba1/8CuO4.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume80
    Issue number1
    Pages (from-to)104505
    ISSN0163-1829
    DOIs
    Publication statusPublished - 2009

    Bibliographical note

    Copyright (2009) by the American Physical Society.

    Keywords

    • Materials research
    • Superconducting materials for the energy sector

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