Neutron Brillouin scattering with pulsed spallation neutron source - spin-wave excitations from ferromagnetic powder samples -

Abstract

Neutron Brillouin scattering (NBS) method was developed using a pulsed spallation neutron source, and the feasibility of NBS was demonstrated by observing ferromagnetic spin waves in La${}_{0.8}$Sr${}_{0.2}$MnO${}_3$ and SrRuO${}_3$ powders. Gapless spin-wave excitations were observed in La${}_{0.8}$Sr${}_{0.2}$MnO${}_3$, which were continuously extended to the lower scattering vector $Q$ from previous results using single crystals. The novel result is a well-defined quadratic $Q$ dependence in the spin-wave dispersion curve with a large energy gap in SrRuO${}_3$ indicating robust spin-orbit coupling.

References in corpus (2)

• Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space
• Large anisotropy in the paramagnetic susceptibility of SrRuO3 films

Cited by in corpus (4)

• Spin Excitations and Spin Wave Gap in the Ferromagnetic Weyl Semimetal Co${}_3$Sn${}_2$S${}_2$
• Symmetry-Driven Spin-Wave Gap Modulation in Nanolayered SrRuO3/SrTiO3 Heterostructures: Implications for Spintronic Applications
• Violation of the magnonic Wiedemann-Franz law in the strong nonlinear regime
• Time-of-flight elastic and inelastic neutron scattering studies on the localized $4d$ electron layered perovskite La${}_5$Mo${}_4$O${}_{16}$