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

arXiv · 0904.0095

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

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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.

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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. 2009-06-10. Magnetic ordering in electronically phase separated Sr/O co-doped La(2-x)Sr(x)CuO(4+y). https://arxiv.org/abs/0904.0095

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