Magnetic ordering in electronically phase-separated La2-x Srx CuO4+y: Neutron diffraction experiments
Journal
Physical Review B - Condensed Matter and Materials Physics
Journal Volume
80
Journal Issue
1
Date Issued
2009
Author(s)
Udby, L.
Andersen, N. H.
Christensen, N. B.
Emery, S. B.
Lefmann, K.
Lynn, J. W.
Mohottala, H. E.
Niedermayer, C.
Wells, B. O.
Abstract
We present results of magnetic neutron diffraction experiments on the codoped superoxygenated La2-x Srx CuO4+y (LSCO+O) system with x=0.09. We find that the magnetic phase is long-range ordered incommensurate antiferromagnetic with a Néel temperature TN coinciding with the superconducting ordering temperature Tc =40 K. The incommensurability value is consistent with a hole doping of nh ≈ 1 8 but in contrast to nonsuperoxygenated La2-x Srx CuO4 with hole doping close to nh ≈ 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 spin and charge ordered "stripe" compounds La1.48 Nd0.40 Sr0.12 CuO4 and La7/8 Ba1/8 CuO4. © 2009 The American Physical Society.
Type
journal article