Evidence for incommensurate spin fluctuations in Sr2RuO4

We report inelastic neutron scattering measurements in the normal state of SnRuO4 reveal the existence of significant incommensurate magnetic spin fluctuations located at q(o) = (+/-0.6 pi/a, +/-0.6 pi/a, 0). This finding confirms recent band-structure calculations that have predicted incommensurate magnetic responses related to dynamical nesting properties of its Fermi surface and points towards the possibility of a competition between p-wave spin triplet and d-wave spin singlet superconductivity in Sr2RuO4 We present a comparison between low energy spin fluctuations, converted in absolute units, from inelastic neutron scattering measurements and previous nuclear magnetic resonance studies.