Magnetic ordering in electronically phase separated Sr/O co-doped La(2-x)Sr(x)CuO(4+y)

L. Udby; N. H. Andersen; F. C. Chou; N. B. Christensen; S. B. Emery; K. Lefmann; J. W. Lynn; H. E. Mohottala; Ch. Niedermayer; B. O. Wells

Magnetic ordering in electronically phase separated Sr/O co-doped La(2-x)Sr(x)CuO(4+y)

Superconductivity 2009-06-10 v2 Strongly Correlated Electrons

Authors: L. Udby , N. H. Andersen , F. C. Chou , N. B. Christensen , S. B. Emery , K. 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 co-doped super-oxygenated La(2-x)Sr(x)CuO(4+y) (LSCO+O) system with x=0.09. The spin-density wave has been studied and we find long-range incommensurate antiferromagnetic order below T_N coinciding with the superconducting ordering temperature T_c=40 K. The incommensurability value is consistent with a hole-doping of n_h~1/8, but in contrast to non-superoxygenated La(2-x)Sr(x)CuO(4) with hole-doping close to n_h ~ 1/8 the magnetic order parameter is not field-dependent. We attribute this to the magnetic order being fully developed in LSCO+O as in the other striped lanthanum-cuprate systems.

Keywords

magnetic ordering electronically phase separated Sr/O co-doped La(2-x)Sr(x)CuO(4+y) spin-density wave incommensurate antiferromagnetic order superconducting ordering temperature

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@article{arxiv.0904.0095,
  title  = {Magnetic ordering in electronically phase separated Sr/O co-doped La(2-x)Sr(x)CuO(4+y)},
  author = {L. Udby and N. H. Andersen and F. C. Chou and N. B. Christensen and S. B. Emery and K. Lefmann and J. W. Lynn and H. E. Mohottala and Ch. Niedermayer and B. O. Wells},
  journal= {arXiv preprint arXiv:0904.0095},
  year   = {2009}
}

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6 pages, 4 figures

Magnetic ordering in electronically phase separated Sr/O co-doped La(2-x)Sr(x)CuO(4+y)

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