Magnetic resonances in EuSn2As2 single crystal
In this work, we report the broad-band ferromagnetic resonance spectroscopy of EuSn2As2 single crystals at
different temperatures in combination with magnetization measurements and structural characterization. We
observe conventional collective acoustic resonance mode of the A-type antiferromagnetic canted state in the Eu
sub-lattice, and its transition to the paramagnetic resonance above the ordering temperature. Furthermore, we
observe reproducibly additional well-defined spectral line. The origin of the additional line remains unclear.
However, its temperature dependence associates it with the magnetism in the Eu sub-lattice.