Two-dimensional incommensurate magnetic fluctuations in Sr${}_2$(Ru${}_{0.99}$Ti${}_{0.01}$)O${}_4$

Abstract

We investigate the imaginary part of the wave vector dependent dynamic spin susceptibility in Sr${}_2$(Ru${}_{0.99}$Ti${}_{0.01}$)O${}_4$ as a function of temperature using neutron scattering. At T=5 K, two-dimensional incommensurate (IC) magnetic fluctuations are clearly observed around ${\mathbf{Q}}_{\text{c}}=(0.3,0.3,L)$ up to approximately 60 meV energy transfer. We find that the IC excitations disperse to ridges around the $(\pi ,\pi )$ point. Below 50 K, the energy and temperature dependent excitations are well described by the phenomenological response function for a Fermi liquid system with a characteristic energy of 4.0(1) meV. Although the wave vector dependence of the IC magnetic fluctuations in Sr${}_2$(Ru${}_{0.99}$Ti${}_{0.01}$)O${}_4$ is similar to that in the Fermi liquid state of the parent compound, Sr${}_2$RuO${}_4$, the magnetic fluctuations are clearly suppressed by the Ti-doping.

5 pages, 4 figures

References in corpus (3)

• High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
• Inelastic neutron scattering study of the magnetic fluctuations in Sr${}_2$RuO${}_4$
• Lattice dynamics and electron-phonon coupling in Sr2RuO4

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• Neutron scattering studies on spin fluctuations in Sr${}_2$RuO${}_4$
• Competition between d-wave superconductivity and magnetism in uniaxially strained Sr2RuO4
• Impurity induced magnetic ordering in Sr${}_2$RuO${}_4$
• Non-Fermi surface nesting driven commensurate magnetic ordering in Fe-doped Sr${}_2$RuO${}_4$