Influence of electric voltage bias on converse magnetoelectric coefficient in piezofiber/Metglas bilayer laminate composites

Soft magnetic material FeCoV is sensitive to magnetic field and its cost is lower than giant magnetostriction materials (Terfenol-D et al.). In the present investigation Pb (Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) with different thickness and FeCoV laminate with 0.8mm thickness were assembled into layer structure to study the effect of the PMN-PT volume fraction on the magnetoelectric coefficient of PMN-PT/FeCoV laminate composites. The ME coefficients and voltages have been characterized in the longitudinally magnetized and transversely polarized mode. The measurement was conducted under a static magnetic field superimposed with an alternating magnetic field. The influences of the static and the alternating field strength were discussed. The peak ME coefficient was obtained at 430 Oe. With the volume fraction of PMN-PT increased, the ME coefficient decreased within the experiment fraction. It can be explained by the module of M.I.Bichurin. A linear relationship was observed between the magnetoelectric voltage and the alternating field strength under a static field of 400 Oe. The ME voltage decreased when the PMN-PT volume fraction increased in the experiment fraction.

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High non-linear magnetoelectric coefficient in Metglas/PMN-PT laminate composites under zero direct current magnetic bias

Journal of Applied Physics ◽

10.1063/1.4867516 ◽

2014 ◽

Vol 115 (9) ◽

pp. 094102 ◽

Cited By ~ 19

Author(s):

Ying Shen ◽

Junqi Gao ◽

Yaojin Wang ◽

Jiefang Li ◽

D. Viehland

Keyword(s):

Direct Current ◽

Magnetic Bias ◽

Laminate Composites ◽

Non Linear ◽

Magnetoelectric Coefficient

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Electrical Tuning of Converse Magnetoelectric Effect in Piezo-Fiber/Metglas Laminates

Volume 2: Multifunctional Materials; Enabling Technologies and Integrated System Design; Structural Health Monitoring/NDE; Bio-Inspired Smart Materials and Structures ◽

10.1115/smasis2009-1300 ◽

2009 ◽

Author(s):

Tao Wu ◽

Tien-Kan Chung ◽

Gregory P. Carman

Keyword(s):

Magnetic Field ◽

Laminate Composite ◽

Magnetoelectric Effect ◽

Fiber Layer ◽

Electric Voltage ◽

Dc Voltage ◽

Dc Magnetic Field ◽

Voltage Bias ◽

Field Bias ◽

Magnetoelectric Response

The converse magnetoelectric effect of an asymmetric Piezo-fiber/Metglas bilayer laminate composite subjected to DC electric voltage and magnetic field biases is presented. The experimental results indicate that positive voltages applied to the Piezo-fiber layer produce large tensile strains in the Piezo-fiber layer with relatively small compressive strains in the Metglas layer. The influence of DC electric voltage bias on the converse magnetoelectric effect is studies and it is found that an optimal DC voltage bias exists to maximize the CME coefficient related to the “jumping” stress/strain in the Metglas. The optimum DC magnetic field bias is shift by applying DC voltage biases and the magnitude of converse magnetoelectric response can be electrically tuned.

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Influence of DC Voltage Bias on the Converse Magnetoelectric Effect Response in PZT/Terfenol-D/PZT Laminate Composites

ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2 ◽

10.1115/smasis2010-3812 ◽

2010 ◽

Author(s):

Joshua L. Hockel ◽

Tao Wu ◽

Gregory P. Carman

Keyword(s):

Experimental Data ◽

Mechanical Stress ◽

Applied Voltage ◽

Magnetoelectric Effect ◽

Laminate Composites ◽

Dc Voltage ◽

Voltage Bias

The converse magnetoelectric effect (CME) response of a Pb(Zr0.52Ti0.48)O3 (PZT)/ Tb0.30Dy0.7Fe2 (Terfenol-D)/PZT laminate to applied DC voltage bias has been investigated. Experimental data demonstrates that the CME coefficient αCME is highly dependent on applied voltage bias. The voltage bias is shown to increase the piezomagnetic coefficient δλ/δB of the Terfenol-D and by extension the αCME, however an optimal αCME has yet to be identified. The ME laminate exhibits considerable gains in αCME (up to 100%) due in part to the improved magnetostrictive response of Terfenol-D under piezoelectric-induced mechanical stress.

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Effects of high pressure on the crystallization of carbon fiber reinforced polyetheretherketone (CF/PEEK) laminate composites

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100177519 ◽

1990 ◽

Vol 48 (4) ◽

pp. 876-877

Author(s):

Hong-Ming Lin ◽

C. H. Liu ◽

R. F. Lee

Keyword(s):

High Pressure ◽

Carbon Fiber ◽

Sample Surface ◽

High Yield ◽

Fiber Reinforced ◽

Laminate Composites ◽

Peek Composite ◽

Continuous Carbon Fiber ◽

Carbon Fiber Reinforced

Polyetheretherketone (PEEK) is a crystallizable thermoplastic used as composite matrix materials in application which requires high yield stress, high toughness, long term high temperature service, and resistance to solvent and radiation. There have been several reports on the crystallization behavior of neat PEEK and of CF/PEEK composite. Other reports discussed the effects of crystallization on the mechanical properties of PEEK and CF/PEEK composites. However, these reports were all concerned with the crystallization or melting processes at or close to atmospheric pressure. Thus, the effects of high pressure on the crystallization of CF/PEEK will be examined in this study.The continuous carbon fiber reinforced PEEK (CF/PEEK) laminate composite with 68 wt.% of fibers was obtained from Imperial Chemical Industry (ICI). For the high pressure experiments, HIP was used to keep these samples under 1000, 1500 or 2000 atm. Then the samples were slowly cooled from 420 °C to 60 °C in the cooling rate about 1 - 2 degree per minute to induce high pressure crystallization. After the high pressure treatment, the samples were scanned in regular DSC to study the crystallinity and the melting temperature. Following the regular polishing, etching, and gold coating of the sample surface, the scanning electron microscope (SEM) was used to image the microstructure of the crystals. Also the samples about 25mmx5mmx3mm were prepared for the 3-point bending tests.

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Identifikasi Miskonsepsi dan Tingkat Pemahaman Mahasiswa Tadris Fisika pada Materi Listrik Dinamis Menggunakan 3-Tier Diagnostic Test

Journal of Natural Science and Integration ◽

10.24014/jnsi.v3i2.9911 ◽

2020 ◽

Vol 3 (2) ◽

pp. 128

Author(s):

Lalu A. Didik ◽

Muh. Wahyudi ◽

Muhammad Kafrawi

Keyword(s):

Diagnostic Test ◽

Physics Education ◽

Quantitative Research ◽

Full Understanding ◽

Study Program ◽

Electric Voltage ◽

Quantitative Research Methods ◽

Physics Courses ◽

Basic Physics ◽

Level Of Understanding

This study aims to determine the misconceptions and level of understanding of physics education students on dynamic electricity. The method used is descriptive quantitative research methods. The research sample was 33 students of the tadris physics study program who are currently taking basic physics courses 2 even semester 2019/2020. Data collection used a 3-tier diagnostic test. In the concept of current and electric voltage, students who are included in the full understanding category are 26% and 29% understand partially with the low category and the level of misconception reaches 45%. In the concept of ohm law and electrical resistance, it was found that students with a full understanding level of 23% and partially understanding 14% were in the low category and the level of student misconception showed the largest percentage, namely 63% with the high category. In the concept of electrical circuits, students with a full understanding level of 29% and partially understanding 50% and included in the medium category with student misconceptions showed the smallest percentage was 21% with the low category. As a whole, it shows that the average level of students' understanding and misconceptions on dynamic electricity material is still low with a percentage of 26% and partial understanding is moderate with a percentage of 31% and a misconception of 43% with a moderate category. Keywords: Misconception, level of undertanding, 3-tier diagnostic, electricicity.ABSTRAK.Penelitian ini bertujuan untuk mengetahui miskonsepsi dan tingkat pemahaman mahasiswa tadris fisika pada materi listrik dinamis. Metode yang digunakan adalah metode penelitian deskriptif kuantitatif. Sampel penelitian adalah 33 orang mahasiswa program studi tadris fisika yang sedang menempuh mata kuliah fisika dasar 2 semester genap 2019/2020. Pengumpulan data menggunakan 3-tier diagnostic test. Pada konsep arus dan tegangan listrik, mahasiswa yang termasuk dalam kategori pemahaman penuh sebesar 26% dan paham sebagian sebesar 29% dengan kategori rendah dan tingkat miskonsepsi mencapai 45%. Pada konsep hukum ohm dan hambatan listrik didapatkan bahwa mahasiswa dengan tingkat pemahaman penuh sebesar 23% dan paham sebagian 14% dengan kategori rendah dan tingkat miskonsepsi mahasiswa menunjukkan persentase paling besar yaitu sebesar 63% dengan kategori tinggi. Pada konsep rangkaian listrik, mahasiswa dengan tingkat pemahaman penuh 29%, paham sebagian 50% dengan kategori sedang serta miskonsepsi mahasiswa menunjukkan persentase paling kecil yaitu 21% dengan kategori rendah. Secara kesuluruhan rata-rata tingkat pemahaman dan miskonsepsi mahasiswa pada materi listrik dinamis masih tergolong rendah dengan persentase sebesar 26% dan paham sebagian tergolong sedang dengan persentase 31% dan miskonsepsi sebesar 43% dengan kategori sedang.Kata kunci: miskonsepsi, tingkat pemahaman, 3-tier diagnostic, listrik dinamis

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Determination of the transverse shear stress in layered composites

Industrial laboratory Diagnostics of materials ◽

10.26896/1028-6861-2020-86-2-44-53 ◽

2020 ◽

Vol 86 (2) ◽

pp. 44-53

Author(s):

Yu. I. Dudarkov ◽

M. V. Limonin

Keyword(s):

Shear Stress ◽

Transverse Shear ◽

Composite Beam ◽

Layered Composite ◽

Equivalent Model ◽

Shear Stresses ◽

Transverse Shear Stress ◽

Layered Composites ◽

Laminate Composites ◽

Transverse Shear Stresses

An engineering approach to estimation of the transverse shear stresses in layered composites is developed. The technique is based on the well-known D. I. Zhuravsky equation for shear stresses in an isotropic beam upon transverse bending. In general, application of this equation to a composite beam is incorrect due to the heterogeneity of the composite structure. According to the proposed method, at the first stage of its implementation, a transition to the equivalent model of a homogeneous beam is made, for which the Zhuravsky formula is valid. The transition is carried out by changing the shape of the cross section of the beam, provided that the bending stiffness and generalized elastic modulus remain the same. The calculated shear stresses in the equivalent beam are then converted to the stress values in the original composite beam from the equilibrium condition. The main equations and definitions of the method as well as the analytical equation for estimation of the transverse shear stress in a composite beam are presented. The method is verified by comparing the analytical solution and the results of the numerical solution of the problem by finite element method (FEM). It is shown that laminate stacking sequence has a significant impact both on the character and on the value of the transverse shear stress distribution. The limits of the applicability of the developed technique attributed to the conditions of the validity of the hypothesis of straight normal are considered. It is noted that under this hypothesis the shear stresses do not depend on the layer shear modulus, which explains the absence of this parameter in the obtained equation. The classical theory of laminate composites is based on the similar assumptions, which gives ground to use this equation for an approximate estimation of the transverse shear stresses in in a layered composite package.

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Формирование изображений электрических сигналов преобразователя магнитного поля при гистерезисной интерференции для контроля металлов в импульсных магнитных полях

Дефектоскопия ◽

10.31857/s0130308220110044 ◽

2020 ◽

pp. 38-45

Author(s):

В.В. Павлюченко ◽

Е.С. Дорошевич

Keyword(s):

Magnetic Field ◽

Aluminum Plate ◽

Thickness Variation ◽

Magnetic Carrier ◽

Electric Voltage ◽

Total Strength ◽

Magnetic Field Transducer ◽

The Given ◽

The Magnetic Field

Based on the developed methods of hysteresis interference, the calculated dependences U(x) of the electric voltage taken from the magnetic field transducer on the x coordinate were obtained. A magnetic carrier with an arctangent characteristic was exposed to a series of bipolar pulses of the magnetic field of a linear inductor of one, two, three, four, five and fifteen pulses. An algorithm is presented for the sequence of changes in the magnitude of the total strength of the magnetic field pulses on the surface of an aluminum plate, which provides the same amplitude of hysteresis oscillations of the electric voltage and makes it possible to obtain a linear difference dependence U(x) for wedge-shaped and flat aluminum samples. The results obtained make it possible to increase the accuracy and efficiency of control of the thickness of the object and its thickness variation in the given directions, as well as the defects of the object.

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All organic multiferroic magnetoelectric complexes with strong interfacial spin-dipole interaction

npj Flexible Electronics ◽

10.1038/s41528-021-00120-0 ◽

2021 ◽

Vol 5 (1) ◽

Author(s):

Yuying Yang ◽

Zhiyan Chen ◽

Xiangqian Lu ◽

Xiaotao Hao ◽

Wei Qin

Keyword(s):

Magnetic Field ◽

Light Intensity ◽

Room Temperature ◽

Incident Light ◽

Dipole Interaction ◽

Interfacial Interaction ◽

Magnetoelectric Coupling ◽

Incident Light Intensity ◽

Organic Ferromagnets ◽

Magnetoelectric Coefficient

AbstractThe organic magnetoelectric complexes are beneficial for the development on flexible magnetoelectric devices in the future. In this work, we fabricated all organic multiferroic ferromagnetic/ferroelectric complexes to study magnetoelectric coupling at room temperature. Under the stimulus of external magnetic field, the localization of charge inside organic ferromagnets will be enhanced to affect spin–dipole interaction at organic multiferroic interfaces, where overall ferroelectric polarization is tuned to present an organic magnetoelectric coupling. Moreover, the magnetoelectric coupling of the organic ferromagnetic/ferroelectric complex is tightly dependent on incident light intensity. Decreasing light intensity, the dominated interfacial interaction will switch from spin–dipole to dipole–dipole interaction, which leads to the magnetoelectric coefficient changing from positive to negative in organic multiferroic magnetoelectric complexes.

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