Chirality of magnetic excitations in ferromagnetic SrRuO3

Ferromagnetic SrRuO3 was proposed as a candidate material to exhibit an inverted magnon chirality due to a strong impact of spin-orbit coupling and Weyl fermions. By polarized inelastic neutron scattering under magnetic fields we determine the chirality of the ferromagnetic zone-center excitation as a function of temperature. Well in the ferromagnetic phase the excitation is perfectly chiral with the usual (right-handed) sign and only when the spontaneous magnetization is almost completely suppressed the chirality of the zone center magnetic excitations is reduced but does not change sign.

Automated summary

By conducting polarized inelastic neutron scattering experiments under magnetic fields, we have determined the chirality of ferromagnetic zone-center excitations as a function of temperature. The results show that the excitation is perfectly chiral in the ferromagnetic phase and when the spontaneous magnetization is almost completely suppressed, the chirality is reduced but does not change sign.