We fabricate a surface acoustic wave (SAW) device on a multiferroic ${\mathrm{BiFeO}}_3$ crystal while SAW devices are usually fabricated on nonmagnetic piezoelectrics and commercially available as bandpass filters. By using the time-domain technique, we demonstrate the SAW excitation on ${\mathrm{BiFeO}}_3$. The amplitude and phase of the SAW signal are modulated by the external magnetic field reflecting the multiferroicity of ${\mathrm{BiFeO}}_3$. The magnetic controllability of the multiferroic SAW device seems useful for the further functionalization of the SAW device.

• Received 31 August 2017
• Revised 17 November 2017

DOI:https://doi.org/10.1103/PhysRevApplied.9.034034