Propagation of laser-generated GHz surface acoustic wavepackets in FeRh/MgO(001) below and above the antiferromagnetic-ferromagnetic phase transition
This study experimentally demonstrates that laser-generated gigahertz surface acoustic wavepackets in FeRh/MgO(001) exhibit tunable excitation efficiency and anisotropic dispersion characteristics driven by the material's antiferromagnetic-to-ferromagnetic phase transition, highlighting its potential for magnetoacoustic spintronic applications.