Magnon dispersion in ferromagnetic SrRuO${}_3$

Abstract

The magnetic excitations in ferromagnetic SrRuO${}_3$ were studied by inelastic neutron scattering combining experiments on triple-axis and time-of-flight spectrometers with and without polarization analysis. A quadratic spin-wave dispersion with an anisotropy gap describes the low-energy low-temperature response. The magnon dispersion extends to at least 35 meV and there is no direct evidence for a continuum of Stoner excitations below this energy. However, the magnon response is weakened at higher energy. In addition to the anomalous softening of the spin-wave stiffness and of the gap, which is induced by the topology of the Bloch states, the magnon excitations are broadened in energy and this effect increases upon heating.

References in corpus (28)

• Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Transport Properties, Thermodynamic Properties, and Electronic Structure of SrRuO3
• Metamagnetism and critical fluctuations in high quality single crystals of the bilayer ruthenate Sr3Ru2O7
• Evidence for incommensurate spin fluctuations in Sr_2RuO_4
• HORACE: software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
• Competitions in layered ruthenates: ferro- vs. antiferromagnetism and triplet vs. singlet pairing
• Linear Response Calculations of Spin Fluctuations
• Weyl fermions and the anomalous Hall effect in metallic ferromagnets
• Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide
• Inelastic neutron scattering study of magnetic excitations in Sr${}_2$RuO${}_4$
• Resonant magnetic excitations at high energy in superconducting $\mathbf{YB}{\mathbf{a}}_2\mathbf{C}{\mathbf{u}}_3{\mathbf{O}}_{6.85}$
• Different dimensionality trends in the Landau damping of magnons in iron, cobalt and nickel: time dependent density functional study
• Incommensurate magnetic ordering in Sr_2Ru_(1-x)Ti_xO_4
• Spin fluctuations in Sr2RuO4 from polarized neutron scattering: implications for superconductivity
• Magnetic response of Sr${}_2$RuO${}_4$: quasi-local spin fluctuations due to Hund's coupling
• Electronic and Spin States of SrRuO3 Thin Films: an X-ray Magnetic Circular Dichroism Study
• Soft x-ray magnetic circular dichroism study of Ca_1-xSr_xRuO_3 across the ferromagnetic quantum phase transition
• Interplay of electronic and spin degrees in ferromagnetic SrRuO${}_3$: anomalous softening of magnon gap and stiffness
• Observation of spin-dependent dual ferromagnetism in perovskite ruthenates
• Magnetic excitations in the metallic single-layer Ruthenates Ca(2-x)Sr(x)RuO(4) studied by inelastic neutron scattering
• Magnon dispersion in Ca2RuO4: impact of spin-orbit coupling and oxygen moments
• Magnetic anisotropy of large floating-zone-grown single-crystals of SrRuO3
• The thickness dependence of quantum oscillations in ferromagnetic Weyl metal SrRuO${}_3$
• Magnetization-density distribution in the metallic ferromagnet SrRuO3 determined by polarized neutron diffraction
• Magnetic shape-memory effect in SrRuO${}_3$
• Damping of spin waves and singularity of the longitudinal modes in the dipolar critical regime of the Heisenberg-ferromagnet EuS
• Field-induced paramagnons at the metamagnetic transition in Ca1.8Sr0.2RuO4