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Antiferromagnetic Order of the Ru and Gd in Superconducting RuSr2GdCu2O8

J. W. Lynn·B. Keimer·C. Ulrich·C. Bernhard·J. L. Tallon
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Abstract

Neutron diffraction has been used to study the magnetic order in RuSr{2}GdCu2O8. The Ru moments order antiferromagnetically at T{N}=136(2)K, coincident with the previously reported onset of ferromagnetism. Neighboring spins are antiparallel in all three directions, with a low T moment of 1.18(6) mu {B} along the c-axis. Our measurements put an upper limit of ~0.1 mu{B} to any net zero-field moment, with fields exceeding ~0.4T needed to induce a measurable magnetization. The Gd ions order independently at T{N}=2.50(2)K with the same spin configuration. PACS numbers: 74.72.Jt, 75.25.+z, 74.25.Ha, 75.30.Kz

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J. W. Lynn, B. Keimer, C. Ulrich, C. Bernhard, J. L. Tallon. 2000-01-31. Antiferromagnetic Order of the Ru and Gd in Superconducting RuSr2GdCu2O8. https://doi.org/10.1103/physrevb.61.r14964

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