A local probe study of magnetism in RuO₂ by nuclear resonance scattering

Magnetic properties of ruthenium dioxide are of interest due to predicted altermagnetic behavior of this rutile-structure material. Whereas neutron diffraction provides indications for an antiferromagnetic ground state, muon spin rotation indicates a much lower upper limit for a possible magnetic moment. Here, we report on new analysis of ruthenium-99 Mossbauer spectroscopy and nuclear forward scattering of synchrotron radiation and the implications for magnetism. This data will also be complemented with inelastic neutron scattering measurements and lattice dynamics calculations.

Fritz Wagner, Lorenzo Stievano, Dimitrios Bessas, and John Budai are acknowledge for initial data acquisition of the data we reanalyzed here.