Comparative theoretical study of the resonance frequencies of the longitudinal-shear and torsion modes of the magnetoelectric effect in a two-layer magnetostrictive-piezoelectric structure Metglas / GaAs

Abstract The article is devoted to a comparative theoretical study of the frequencies of the electromechanical resonance (EMR) of the magnetoelectric (ME) effect in the magnetostrictive-piezosemiconductor structure Metglas / GaAs of the longitudinal-shear and torsional modes. It is found that the resonance frequencies for the torsional mode are approximately 2 times higher than the corresponding frequencies for the longitudinal-shear mode. Therefore, it is quite possible to observe the torsional mode of the ME effect against the background of the longitudinal-shear mode, since the resonance frequencies are well distinguishable. The results obtained can find application in the construction of new ME devices.

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Magnetoelectric Effect in Ferrite-Piezoelectric Dual-Phase Structure

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.233-234.353 ◽

2015 ◽

Vol 233-234 ◽

pp. 353-356

Author(s):

Roman V. Petrov ◽

Alexander S. Tatarenko ◽

Vladimir M. Petrov ◽

Mirza I. Bichurin

Keyword(s):

Energy Transfer ◽

Lead Zirconate Titanate ◽

Magnetoelectric Effect ◽

Resonance Region ◽

Lead Zirconate ◽

Dual Phase ◽

Theoretical Frequency ◽

Voltage Coefficient ◽

Piezoelectric Structure ◽

Electromechanical Resonance

This manuscript is devoted to the magnetoelectric coupling in a dimensionally graded magnetostrictive-piezoelectric structure in the electromechanical resonance region. Theoretical frequency dependence of ME voltage coefficient is obtained. Theoretical estimates for the layered structure of lead zirconate-titanate and single-crystal Zn0,3Ni0,7Fe2O4 are in satisfactory agreement with data. The obtained results are expected to facilitate observation of enhanced ME coupling at overlapping of electromechanical and magnetic resonance due to energy transfer between spin waves and phonons.

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Direct Determination of Dynamic Elastic Modulus and Poisson’s Ratio of Timoshenko Rods

Vibration ◽

10.3390/vibration2010010 ◽

2019 ◽

Vol 2 (1) ◽

pp. 157-173 ◽

Cited By ~ 1

Author(s):

Guadalupe Leon ◽

Hung-Liang Chen

Keyword(s):

Exact Solution ◽

Finite Element ◽

Elastic Constants ◽

Frequency Ratio ◽

Poisson’S Ratio ◽

Direct Determination ◽

Poisson's Ratio ◽

Torsional Mode ◽

Bending Mode ◽

Resonance Frequencies

In this paper, the exact solution of the Timoshenko circular beam vibration frequency equation under free-free boundary conditions was determined with an accurate shear shape factor. The exact solution was compared with a 3-D finite element calculation using the ABAQUS program, and the difference between the exact solution and the 3-D finite element method (FEM) was within 0.15% for both the transverse and torsional modes. Furthermore, relationships between the resonance frequencies and Poisson’s ratio were proposed that can directly determine the elastic constants. The frequency ratio between the 1st bending mode and the 1st torsional mode, or the frequency ratio between the 1st bending mode and the 2nd bending mode for any rod with a length-to-diameter ratio, L/D ≥ 2 can be directly estimated. The proposed equations were used to verify the elastic constants of a steel rod with less than 0.36% error percentage. The transverse and torsional frequencies of concrete, aluminum, and steel rods were tested. Results show that using the equations proposed in this study, the Young’s modulus and Poisson’s ratio of a rod can be determined from the measured frequency ratio quickly and efficiently.

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Specific Features of the Magnetoelectric Effect in Permendur–Quartz–Permendur Structures in the Region of Electromechanical Resonance

Technical Physics Letters ◽

10.1134/s1063785019050092 ◽

2019 ◽

Vol 45 (5) ◽

pp. 436-438 ◽

Cited By ~ 1

Author(s):

V. M. Laletin ◽

D. A. Filippov ◽

N. N. Poddubnaya ◽

I. N. Manicheva ◽

G. Srinivasan

Keyword(s):

Magnetoelectric Effect ◽

Electromechanical Resonance

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Field dependence of magnetoelectric effect in the electromechanical resonance region on the Permendur -Quartz - Permendur structures

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/939/1/012040 ◽

2020 ◽

Vol 939 ◽

pp. 012040

Author(s):

V M Laletin ◽

N N Paddubnaya ◽

D A Filippov

Keyword(s):

Field Dependence ◽

Magnetoelectric Effect ◽

Resonance Region ◽

Electromechanical Resonance

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A Study on Bandwidth and Performance Limitations of Array Vibration Harvester Configurations

Energy Harvesting and Systems ◽

10.1515/ehs-2016-0018 ◽

2019 ◽

Vol 4 (1) ◽

pp. 47-56 ◽

Cited By ~ 2

Author(s):

Noha Aboulfotoh ◽

Jens Twiefel

Keyword(s):

Energy Harvesting ◽

Lower Limit ◽

Output Power ◽

Theoretical Study ◽

Design Guidelines ◽

Single Element ◽

Upper Limit ◽

Resonance Frequencies ◽

And Performance ◽

Power Capability

Abstract Many researchers introduced an array of generators for broadband energy harvesting. The array has been studied in comparison to a single element from this array, but never compared to a single reference harvester with same volume as the whole array. This paper presents a theoretical study of evaluating the performance of the array harvester in comparison to the reference harvester. Power from the reference harvester as well as from the array is analytically calculated. The array is compared to the reference harvester when loaded by their optimal resistances which provide maximum power capability. The comparison is divided into two sections: firstly when the elements of the array are tuned to resonate at matching frequencies and secondly when they are tuned to non-matching resonance frequencies. The comparisons lead to two significant limits of the working bandwidth of the array: the lower and the upper limit. Between the two limits, the power produced from the array is less than the reference harvester, but with a small additional bandwidth. Below the lower limit, the array has no advantage over the reference harvester. Above the upper limit, output power of the array is inconsistent. Hence, design guidelines for the array are provided.

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