Excitation of bending vibration by a moving domain wall in a plate of yttrium orthoferrite

Magneto-elastic resonant phenomena at the motion of the domain wall in weak ferromagnets

“…As earlier shown [3], the DW motion at subsonic velocities is accompanied by an excitation of flexural Lamb waves, of which amplitude and phase-frequency characteristics suggest a resonant nature of vibrations at individual frequencies due to the sample size. The maximum amplitude of such vibrations at resonance amounted to 7 nm.…”

“…With periodic driving magnetic field and one finite size of a plate a, at resonant frequencies f pn ¼ pAp 2 /2na 2 ,Lamb waves [3] are formed as standing waves, of which amplitude is constrained by absorption only. Here A ¼ 1.9 Â 10 5 h (cm 2 /s) for YFeO 3 , h are thickness of a plate, p, n is the numbers of a spatial harmonic and a temporal subharmonics, respectively.…”

“…At velocities coinciding with velocities of sound and other quasiparticle excitations they are theoretically and experimentally described [1][2][3][4]. The present work provides the investigation results of the DW dynamics at subsonic velocities, frequency dependencies of deformation resulting from the DW motion and qualitative theoretical consideration of the results obtained.…”