Magnetic Correlations inLa2−xSrxCoO4Studied by Neutron Scattering: Possible Evidence for Stripe Phases

2008/08/01 by M. Cwik, M. Benomar, T. Finger +5 · 4 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.102.057201

arxiv created 2008/08/01 · openalex publication_date 2009/02/02 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Spin correlations in La_2\ensuremath-xSr_xCoO₄ (0.3\ensuremath≤x\ensuremath≤0.6) have been studied by neutron scattering. The commensurate antiferromagnetic order of La₂CoO₄ persists in a very short range up to a Sr content of x=0.3, whereas small amounts of Sr suppress commensurate antiferromagnetism in cuprates and in nickelates. La_2\ensuremath-xSr_xCoO₄ with x>0.3 exhibits incommensurate spin ordering with the modulation closely following the amount of doping. These incommensurate phases strongly resemble the stripe phases observed in cuprates and nickelates, but incommensurate magnetic ordering appears only at larger Sr content in the cobaltates due to a reduced charge mobility.

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