Antiferromagnetic ordering of Ru and Gd in superconducting RuSr 2 GdCu 2 O 8

By J. W. Lynn, Bernhard Keimer, C. Ulrich, C. Bernhard, J. Tallon. 2000

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Neutron diffraction has been used to study the magnetic order in ${\mathrm{RuSr}}_{2}{\mathrm{GdCu}}_{2}{\mathrm{O}}_{8}.$ 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 $1.18(6){\ensuremath{\mu}}_{B}$ along the c axis. Our measurements put an upper limit of $\ensuremath{\sim}0.1{\ensuremath{\mu}}_{B}$ 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.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/7d3906244c7559bee7df3bee99b75b6fede41b20

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