Магнитоэлектрический эффект в трехслойных асимметричных структурах в области изгибных мод колебаний

Abstract A theory of the magnetoelectric effect in three-layer asymmetric structures composed of a piezoelectric layer and two magnetostriction layers with opposite magnetostriction signs is presented. The thickness ratio of the layers is obtained, at which this effect is maximum. It is shown that the sign of the magnetoelectric coefficient changes to opposite (with respect to the initial two-layer structure) with an increase in the third-layer thickness. It is established that the magnetoelectric coefficients of the structures with different arrangements of the layers with positive and negative magnetostriction have opposite signs.

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The theory of direct magnetoelectric effect in the bilayer system of ferromagnetic–piezoelectric

Journal of Advanced Dielectrics ◽

10.1142/s2010135x16500053 ◽

2016 ◽

Vol 06 (01) ◽

pp. 1650005

Author(s):

V. N. Nechaev ◽

A. V. Shuba

Keyword(s):

Magnetic Field ◽

Layer Thickness ◽

Piezoelectric Layer ◽

Magnetoelectric Effect ◽

Variable Magnetic Field ◽

Nonuniform Distribution ◽

Structure Parameters ◽

Simultaneous Solution ◽

Electrical Field ◽

Motion Equations

The theory of direct magnetoelectric (ME) effect in a bilayer of ferromagnetic and piezoelectric is developed taking into account nonuniform distribution of electrical field on a piezoelectric layer thickness. The simultaneous solution of the motion equations for piezoelectric and ferromagnetic mediums allowed to numerically and analytically calculate the dependence of natural mechanical oscillation on structure parameters and to determine the dependence of ME effect coefficient on frequency of the variable magnetic field.

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Tuning Negative Capacitance in PbZr0.2Ti0.8O3/SrTiO3 Heterostructures via Layer Thickness Ratio

Physical Review Applied ◽

10.1103/physrevapplied.16.034004 ◽

2021 ◽

Vol 16 (3) ◽

Author(s):

Yifei Hao ◽

Tianlin Li ◽

Yu Yun ◽

Xin Li ◽

Xuegang Chen ◽

...

Keyword(s):

Layer Thickness ◽

Thickness Ratio ◽

Negative Capacitance ◽

Layer Thickness Ratio

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Effect of substrate to piezoceramic layer thickness ratio on the performance of a C-shape piezoelectric actuator

Sensors and Actuators A Physical ◽

10.1016/j.sna.2007.07.031 ◽

2008 ◽

Vol 141 (1) ◽

pp. 173-181 ◽

Cited By ~ 2

Author(s):

A.N. Mtawa ◽

B. Sun ◽

J. Gryzagoridis

Keyword(s):

Layer Thickness ◽

Piezoelectric Actuator ◽

Thickness Ratio ◽

Layer Thickness Ratio ◽

Piezoceramic Layer

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The Magnetoelectric Effect of a Ni0.3Zn0.62Cu0.08Fe2O4 - PbFe0.5Nb0.5O3 Multilayer Composite

Archives of Metallurgy and Materials ◽

10.2478/amm-2014-0169 ◽

2014 ◽

Vol 59 (3) ◽

pp. 1011-1015

Author(s):

P. Guzdek ◽

M. Sikora ◽

Ł. Góra ◽

Cz. Kapusta

Keyword(s):

Magnetic Field ◽

Magnetoelectric Effect ◽

Magnetic Hysteresis ◽

Tape Casting ◽

Casting Process ◽

Layered Composites ◽

Practical Applications ◽

Magnetoelectric Composite ◽

Sinusoidal Magnetic Field ◽

Magnetoelectric Coefficient

Abstract The magnetoelectric effect in multiferroic materials has been widely studied for its fundamental interest and practical applications. The magnetoelectric effect observed for single phase materials like Cr2O3, BiFeO3, and Pb(Fe0.5Nb0.5)O3 is usually small. A much larger effect can be obtained in composites consisting of magnetostrictive and piezoelectric phases. This paper investigates the magnetoelectric effect of a multilayer (laminated) structure consisting of 6 nickel ferrite and 7 PFN relaxor layers. It describes the synthesis and tape casting process for Ni0.3Zn0.62Cu0.08Fe2O4 ferrite and relaxor PbFe0.5Nb0.5O3 (PFN). Magnetic hysteresis, ZFC - FC curves and dependencies of magnetization versus temperature for PFN relaxor and magnetoelectric composite were measured with a vibrating sample magnetometer (VSM) in an applied magnetic field up to 85 kOe at a temperature range of 10 – 400 K. Magnetoelectric effect at room temperature was investigated as a function of a static magnetic field (0.3 - 6.5 kOe) and the frequency of sinusoidal magnetic field (0.01 - 6.5 kHz). At lower magnetic field, the magnetoelectric coefficient increases slightly before reaching a maximum and then decreases. The magnetoelectric coefficient aME increases continuously as the frequency is raised, although this increase is less pronounced in the 1-6.5 kHz range. Maximum values of the magnetoelectric coefficient attained for the layered composites exceed about 50 mV/(Oe cm).

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Usefulness of cortical thickness ratio of the third metacarpal bone for prediction of major osteoporotic fractures

Bone Reports ◽

10.1016/j.bonr.2021.101162 ◽

2022 ◽

Vol 16 ◽

pp. 101162

Author(s):

Ichiro Yoshii ◽

Naoya Sawada ◽

Tatsumi Chijiwa ◽

Shohei Kokei

Keyword(s):

Cortical Thickness ◽

Osteoporotic Fractures ◽

Metacarpal Bone ◽

Thickness Ratio ◽

The Third ◽

Major Osteoporotic Fractures

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Temperature Characteristics of Magnetoelectric Effect in Bilayer Ferromagnetic-Piezoelectric Structures

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.233-234.357 ◽

2015 ◽

Vol 233-234 ◽

pp. 357-359 ◽

Cited By ~ 4

Author(s):

Dmitry Burdin ◽

Dmitry Chashin ◽

Nikolay Ekonomov ◽

Yuri Fetisov

Keyword(s):

Magnetic Field ◽

Resonant Frequency ◽

Temperature Dependence ◽

Lead Zirconate Titanate ◽

Magnetoelectric Effect ◽

Lead Zirconate ◽

Magnetic Field Sensors ◽

Temperature Characteristics ◽

Magnetoelectric Coefficient ◽

Piezoelectric Structures

Temperature characteristics of resonant magnetoelectric effect in bilayer structures consisting of langatate, lead zirconate titanate, nickel, and amorphous ferromagnetic Metglas layers have been investigated. The measurements were performed in the temperature range of 150-400 K. The influence of the ferromagnetic and piezoelectric layer’s parameters on the temperature dependence of resonant frequency and magnetoelectric coefficient αE has been demonstrated. The results can be used to develop magnetoelectric magnetic field sensors.

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Effects of the layer thickness ratio on the enhanced ductility of laminated aluminum

Journal of Material Science and Technology ◽

10.1016/j.jmst.2021.08.093 ◽

2021 ◽

Author(s):

Yiping Xia ◽

Hao Wu ◽

Kesong Miao ◽

Xuewen Li ◽

Chao Xu ◽

...

Keyword(s):

Layer Thickness ◽

Thickness Ratio ◽

Layer Thickness Ratio

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Analytical Solutions for Flexural Stress of One-way UHPC-NC Hybrid Slab

IABSE Congress, New York, New York 2019: The Evolving Metropolis ◽

10.2749/newyork.2019.0548 ◽

2019 ◽

Author(s):

Zhao Liu ◽

Wei D. Zhuo ◽

Si Q. Yuan

Keyword(s):

Tensile Stress ◽

Layer Thickness ◽

Analytical Solutions ◽

High Performance Concrete ◽

Limit State ◽

Neutral Axis ◽

Thickness Ratio ◽

Slab Thickness ◽

Flexural Stress ◽

Axis Position

<p>Ultra‐high performance concrete (UHPC) is an advanced construction material that affords opportunities to innovate the structures made of conventional concrete (NC). The one‐way UHPC‐NC hybrid slab, designed to have the UHPC layer in tension and the NC layer in compression, can be an optimal use of UHPC for bridge deck. The analytical solutions for normal stress are essential under service limit state, but they cannot be found in the literature by now. Based on the elastic theory, analytical formulas for the neutral axis position and flexural stress are derived. The lowest neutral axis position is attained when the UHPC layer thickness ratio (UHPC layer thickness / hybrid slab thickness) approximates 0.4. The criteria to judge the position of neutral axis within UHPC or NC region are analytically established. To find out the ideal scenario to reach the allowable compressive stress in NC and allowable tensile stress in UHPC simultaneously, an inequality constraint with the elastic modulus ratio is proposed. Considering the UHPC tensile stress limitation and flexural moment capacity of the hybrid slab, the rational thickness ratio of UHPC layer of 0.4 is suggested, which can achieve better economy and efficiency of the hybrid slab.</p>

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M3+(H2AsO4)(H2As2O7) (M3+= Al, Ga) and In2(H2AsO4)2(H2As2O7)2: a new layer structure type and a new framework structure type containing the rare H2As2O72−group

Acta Crystallographica Section C Structural Chemistry ◽

10.1107/s2053229617009676 ◽

2017 ◽

Vol 73 (8) ◽

pp. 600-608 ◽

Cited By ~ 7

Author(s):

Karolina Schwendtner ◽

Uwe Kolitsch

Keyword(s):

Hydrogen Bonds ◽

Room Temperature ◽

Layer Structure ◽

Structure Type ◽

Three Dimensions ◽

Framework Structure ◽

X Ray Diffraction ◽

X Ray ◽

The Third ◽

New Framework

The crystal structures of hydrothermally synthesized aluminium dihydrogen arsenate(V) dihydrogen diarsenate(V), Al(H2AsO4)(H2As2O7), gallium dihydrogen arsenate(V) dihydrogen diarsenate(V), Ga(H2AsO4)(H2As2O7), and diindium bis[dihydrogen arsenate(V)] bis[dihydrogen diarsenate(V)], In2(H2AsO4)2(H2As2O7)2, were determined from single-crystal X-ray diffraction data collected at room temperature. The first two compounds are representatives of a novel sheet structure type, whereas the third compound crystallizes in a novel framework structure. In all three structures, the basic building units areM3+O6octahedra (M= Al, Ga, In) that are connectedviaone H2AsO4−and two H2As2O72−groups into chains, and furtherviaH2As2O72−groups into layers. In Al/Ga(H2AsO4)(H2As2O7), these layers are interconnected by weak-to-medium–strong hydrogen bonds. In In2(H2AsO4)2(H2As2O7)2, the H2As2O72−groups link the chains in three dimensions, thus creating a framework topology, which is reinforced by weak-to-medium–strong hydrogen bonds. The three title arsenates represent the first compounds containing both H2AsO4−and H2As2O72−groups.

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