Enhancement in magnetic field sensitivity and reduction in equivalent magnetic noise by magnetoelectric laminate stacks

Abstract

Articles you may be interested inInfluence of metglas layer on nonlinear magnetoelectric effect for magnetic field detection by frequency modulation J. Appl. Phys. 117, 024104 (2015) We have investigated the equivalent magnetic noise and magnetic field sensitivity for a magnetoelectric (ME) sensor unit of N numbers of ME laminates stacked together. Our results show with increasing N that the modeled and measured equivalent magnetic noises decreased by a factor of ffiffiffi ffi N p and that the magnetic field sensitivities increased by ffiffiffi ffi N p . For Metglas/Pb(Mg 1/3 ,Nb 2/3 ) O 3 -PbTiO 3 laminates, the equivalent magnetic noise decreased and the magnetic field sensitivity increased by a factors of 2.1 and 2.3, respectively, for N ¼ 4 relative to that for N ¼ 1. V C 2012 American Institute of Physics. [http://dx

Stress reconfigurable tunable magnetoelectric resonators as magnetic sensors

“…Maximum sensitivity with minimal applied H dc can be achieved by maximizing d m at low magnetic field bias H dc . For this characteristic, Metglas (FeCoSiB) has been chosen as the magnetostrictive component in several reports 9,12,13 and also in this study. One way to increase resolution and reduce the impact of magnetic and environmental noise is to operate at the electromechanical resonance (EMR), thus enhancing a ME .…”

Review of Magnetoelectric Sensors

“…It consisted of a piezo-fiber layer laminated between FeBSiC alloys. For the first time, the non-resonant ME coefficient at 1 Hz reached 22 V/cm•Oe, making such a structure especially suitable for low-frequency and passive magnetic sensing [31][32][33][34][35], but it should be noted here that the mechanical quality factor for such a 2-1 type ME composites is normally less than 100, so ultra-high resonant ME coefficients cannot be realized in this case [29].…”

“…The total noise level N t comes from both internal and external noise sources. The internal noise is dominated by the dielectric loss N DE and the leakage resistance N R , which can be written as follows [32,33]:…”

Multi-electrode Pb(Zr,TiO)3/Ni cylindrical layered magnetoelectric composite

“…This way, both the ME voltage coefficient value and the resonance frequency can be modified, suitable for applications as magnetic field sensors and energy harvesters. [9][10][11][12][13][14] However, introducing more laminates is disadvantageous to the device miniaturization. Usually, the ME effect is characterized as the average response from the whole surfaces of the samples.…”

“…Usually, the ME effect is characterized as the average response from the whole surfaces of the samples. [4][5][6][7][8][9][10][11][12][13][14] It has been theoretically and experimentally proven that different positions on laminated ME composites have different ME coupling, attributed to the different resonance modes and the corresponding strain distribution. All-surface electrodes on the piezoelectric layer produce an averaged ME effect and reduce the ME voltage, which is also true for the electrically conducting magnetostrictive layer serving as the electrode.…”