Magnetoacoustic resonance in ferrite-ferroelectric nanopillars
Institute of Electronic Information Systems, Novgorod State University, 173003 Veliky Novgorod, Russian Federation
2 Physics Department, Oakland University, Rochester, MI, 48309, USA
Corresponding author: a email@example.com
Published online: 19 June 2009
This work is concerned with the nature of ferromagnetic resonance (FMR) under the influence of acoustic oscillations with the same frequency as FMR. Here we provide the theoretical model for ME coupling at FMR in the nanopillars of ferrite in a piezoelectric matrix. Our calculations show that magnification of ME coefficient is obtained at the magnetoacoustic resonance (MAR) region where FMR and acoustic oscillations at electromechanical resonance (EMR) overlap. The clamping effect of the substrate for nanopillars is considered in determining the ME voltage coefficient. In addition, nanostructures based on single crystal ferrites take on special significance as magnetic resonance line width of such materials may be narrow enough to enable the observation of effects connected with magnetoelastic interaction. As an example, ME coefficient is estimated for the nanopillars of yttrium iron garnet in lead zirconate titanate matrix. The phenomenon is of importance for the realization of multifunctional ME nanosensors/transducers operating at microwave frequencies.
PACS: 75.80.+q – Magnetomechanical and magnetoelectric effects, magnetostriction / 78.67.Pt – Multilayers; superlattices / 76.50.+g – Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009