We observed surface acoustic wave (SAW) propagation on a multiferroic material CuB2O4 with use of two interdigital transducers (IDTs). The period of IDT fingers is as short as 1.6 μm so that the frequency of SAW is 3 GHz, which is comparable with that of magnetic resonance. In the antiferromagnetic phase, the SAW excitation intensity varied with the magnitude and direction of the magnetic field, owing to the dynamical coupling between SAWs and antiferromagnetic resonance of CuB2O4. The microscopic mechanism is discussed based on the symmetrically allowed magnetoelastic coupling.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics