title: Nonlinear magnetoelectric response of planar  ferromagnetic-piezoelectric structures to  sub-millisecond magnetic pulses.
abstract: The magnetoelectric response of bi- and symmetric trilayer composite structures to pulsed magnetic fields is experimentally investigated in detail. The structures comprise layers of commercially available piezoelectric (lead zirconate titanate) and magnetostrictive (permendur or nickel) materials. The magnetic-field pulses have the form of a half-wave sine function with duration of 450 µs and amplitudes ranging from 500 Oe to 38 kOe. The time dependence of the resulting voltage is presented and explained by theoretical estimations. Appearance of voltage oscillations with frequencies much larger than the reciprocal pulse length is observed for sufficiently large amplitudes (~1-10 kOe) of the magnetic-field pulse. The origin of these oscillations is the excitation of bending and planar acoustic oscillations in the structures. Dependencies of the magnetoelectric voltage coefficient on the excitation frequency and the applied magnetic field are calculated by digital signal processing and compared with those obtained by the method of harmonic field modulation. The results are of interest for developing magnetoelectric sensors of pulsed magnetic fields as well as for rapid characterization of magnetoelectric composite structures.
authors.affiliation: Faculty of Electrical Engineering and Information Technology, Regensburg University of Applied Sciences, Regensburg, Germany. florian.kreitmeier@gmx.net
authors.forename: Florian
authors.initials: F
authors.lastname: Kreitmeier
authors.forename: Dmitry V
authors.initials: DV
authors.lastname: Chashin
authors.forename: Yury K
authors.initials: YK
authors.lastname: Fetisov
authors.forename: Leonid Y
authors.initials: LY
authors.lastname: Fetisov
authors.forename: Irene
authors.initials: I
authors.lastname: Schulz
authors.forename: Gareth J
authors.initials: GJ
authors.lastname: Monkman
authors.forename: Mikhail
authors.initials: M
authors.lastname: Shamonin