Magnetoelectric Effects in Ferromagnetic Metal-Piezoelectric Oxide Layered Structures

TL;DR

This paper investigates the frequency-dependent magnetoelectric coupling in ferromagnetic metal-piezoelectric oxide layered structures, revealing giant resonance-enhanced effects and strong coupling in specific material combinations.

Contribution

It provides new insights into the frequency dependence of ME coupling, especially at resonance, and identifies material combinations with strong and enhanced effects.

Findings

Strong ME coupling at resonance with maximum voltage coefficient of 90 V/cm Oe.

ME interactions are significantly stronger for transverse fields than longitudinal.

Permendur and nickel layers exhibit the most pronounced ME effects.

Abstract

Frequency dependence of magnetoelectric (ME) coupling is investigated in trilayers of ferromagnetic alloy and piezoelectric lead zirconate titanate (PZT). The ferromagnetic phases studied include permendur, a soft magnet with high magnetostriction, iron, nickel, and cobalt. Low frequency data on ME voltage coefficient versus bias magnetic field indicate strong coupling only for trilayers with permendure or Ni. Measurements of frequency dependence of ME voltage reveal a giant ME coupling at electromechanical resonance. The ME interactions for transverse fields is an order of magnitude stronger than for longitudinal fields. The maximum voltage coefficient of 90 V/cm Oe at resonance is measured for samples with nickel or permendure and is three orders of magnitude higher than low-frequency values.