Antiferromagnetic ordering of Ru and Gd in superconducting RuSr2GdCu2O8
J. W. Lynn, B. Keimer, C. Ulrich, C. Bernhard, J. L. Tallon
DOI 10.1103/PhysRevB.61.R14964 · Physical Review B
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Abstract
Neutron diffraction has been used to study the magnetic order in RuSr2GdCu2O8. The Ru moments order antiferromagnetically at TN=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)μB along the c axis. Our measurements put an upper limit of ∼0.1μB to any net zero-field moment, with fields exceeding 0.4T needed to induce a measurable magnetization. The Gd ions order independently at TN=2.50(2) K with the same spin configuration.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RuSr2GdCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 35 | Pressure not reported | onset |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure not reported | unknown |
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