Observation of two-dimensional spin fluctuations in the bilayer ruthenate Sr3Ru2
O7 by inelastic neutron scattering

Capogna, L.; Forgan, E. M.; Hayden, S. M.; Wildes, A.; Duffy, J. A.; Mackenzie, A. P.; Perry, R. S.; Ikeda, S.; Maeno, Y.; Brown, S. P.

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Observation of two-dimensional spin fluctuations in the bilayer ruthenate Sr₃Ru₂O₇ by inelastic neutron scattering

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Capogna, L.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Capogna, L., Forgan, E. M., Hayden, S. M., Wildes, A., Duffy, J. A., Mackenzie, A. P., et al. (2003). Observation of two-dimensional spin fluctuations in the bilayer ruthenate Sr₃Ru₂O₇ by inelastic neutron scattering. Physical Review B, 67(1): 012504.

Cite as: https://hdl.handle.net/21.11116/0000-000E-F8DD-2

Abstract

We report an observation of two-dimensional incommensurate
magnetic fluctuations in the layered metallic perovskite
Sr3Ru2O7. The wave vectors where the magnetic fluctuations are
strongest are different from those observed in the
superconducting single layer ruthenate Sr2RuO4 and appear to be
determined by Fermi surface nesting. No antiferromagnetic
ordering is observed for temperatures down to 1.5 K. For
temperatures Tgreater than or similar to20 K, the fluctuations
become predominately ferromagnetic. Our inelastic neutron
scattering measurements provide concrete evidence of the
coexistence of competing interactions in Sr3Ru2O7 and of the
low-energy scale of the fluctuations.