Effective Excitation of Magnetoelectric Voltage Harmonics in a Ferromagnet–Piezoelectric Structure by Current Passing through the Magnetic Layer

Technical Physics Letters - The magnetoelectric (ME) effect in a planar amorphous ferromagnet–piezoelectric lead zirconate titanate (PZT) composite structure can be effectively excited by...     

Nonlinear transformation of magnetic noise in a magnetoelectric structure

Technical Physics Letters - The phenomenon of transformation of the spectrum of magnetic noise in a Metglas/PZT/Metglas magnetoelectric (ME) planar composite structure has been experimentally...     

Transformation of alternating magnetic and electric fields in a ferroelectric-conductor ring structure

We have studied a new phenomenon according to which an alternating magnetic field is transformed into electric voltage and vice versa in a structure comprising a ferroelectric ring with metal electrodes deposited onto its surface. The ferroelectric is polarized in the radial direction and placed into a constant magnetic field, which is perpendicular to the ring plane. The transformation results from a combination of the electromagnetic induction in the conducting circuit and the piezoelectric effect in the ferroelectric ring. This phenomenon can be used for creating magnetic sensors with linear characteristics.     

Permanent magnetic field sensor based on a piezoelectric ring

We describe a permanent magnetic field sensor based on a radially polarized piezoelectric ring, with one electrode carrying alternating current. The device operation principle combines the Ampére force and piezoeffect. The magnetic sensor is characterized by a reduced responsivity of up to 0.2 V/(kOe A). The response is linear in a range of fields up to several hundred kOe.     

Magnetoelectric effect in double-layer ferromagnetic-piezoelectric disk resonators

The magnetoelectric (ME) effect in double-layer composite disk resonators containing mechanically joined layers of magnetostrictive nickel and piezoelectric lead zirconate titanate is experimentally studied. A resonant growth of the efficiency of the ME interaction is discovered at the frequencies of the flexural and radial modes of mechanic vibrations of the resonator. Frequencies of the flexural and radial vibrations of double-layer ME resonators are calculated. The possibilities of controlling the efficiency of the ME interaction by means of selecting the thicknesses of the structure layers and the orientation of the external permanent magnetic field are demonstrated. The sensitivity of the sensors of low-frequency magnetic fields based on ME resonators is estimated.     

Circular Magnetoelectric Heterostructure Based Inductor Tuned with Magnetic and Electric Fields

Journal of Communications Technology and Electronics - Here we present a new design of an inductor based on a circular magnetoelectric heterostructure containing a radially poled ring of...     

Parametric Amplification of Magnetoacoustic Oscillations in a Ferromagnet–Piezoelectric Structure

Technical Physics Letters - A parametric amplification of magnetoacoustic oscillations in a disk resonator containing a FeBSiC ferromagnetic layer and a lead zirconate–titanate piezoelectric...     

Temperature dependence of the characteristics of the resonant magnetoelectric effect in a lead magnesium niobate-lead titanate/nickel structure

We have studied the temperature dependence of the characteristics of the resonant magnetoelectric (ME) interaction in the planar composite structure comprising a ferroelectric layer of lead magnesium niobate-lead titanate and a layer of nickel. It is established that an increase in the temperature in a 220?C340 K interval is accompanied by a decrease in the resonance frequency and in the efficiency of the interaction. The results can be used in developing methods for thermal stabilization of ME devices.     

Complete system of equivalent transformations for two-tape automata with disjoint loops

Two-tape automata are considered such that their transition diagrams do not have intersecting loops. A system of equivalent transformations is described for these automata, and its completeness with respect to the set of the transformations is proved.