Antiferromagnetic Order of the Ru and Gd in Superconducting RuSr2GdCu2O8

Details Antiferromagnetic Order of the Ru and Gd in Superconducting RuSr2GdCu2O8 Antiferromagnetic Order of the Ru and Gd in Superconducting RuSr2GdCu2O8

2000-01-31

arxiv.org/abs/cond-mat/0001456v1

Physics

Condensed Matter

Superconductivity

Four pages, Latex, 5 eps figures

Scientific paper

10.1103/PhysRevB.61.R14964

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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