Observation of an inter-sublattice exchange magnon in CoCr${}_2$O${}_4$ and analysis of magnetic ordering

D. Kamenskyi, H. Engelkamp, T. Fischer +9

We report on an investigation of optical properties of multiferroic CoCr${}_2$O${}_4$ at terahertz frequencies in magnetic fields up to 30 T. Below the ferrimagnetic transition (94…