Exchange-free magnetoelastic plane waves

Abstract

The propagation of waves in a magnetoelastic (ME) material is gyrotropic and dispersive, and dependent on the externally applied dc magnetic bias field. As a basis for using these properties in acoustic wavedevices employed in electronic systems, a systematic description of the propagation characteristics of exchange—free ME plane waves is given. The propagation characteristics are represented via dispersion diagrams and refractive index diagrams. The polarization of the fields is discussed and numerical examples are presented.