Insights into the Performance of Magnetoelectric Ceramic Layered Composites

Ramos, P.; Amorín, Harvey; Ricote, J.; Castro, A.; Algueró, Miguel

doi:10.3390/jcs1020014

Cited by 6 publications

(7 citation statements)

References 33 publications

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“…Here µ 0 is the permeability of vacuum and M s is the saturation magnetization. The magnetostriction was measured by hanging a load to the wire end of 2-10 g and making a number of measurements (3)(4)(5). The average of these measurements was used for λ s .…”

Section: Methodsmentioning

confidence: 99%

“…The field H AC was produced by small Helmholtz coils (2) sourced by an internal generator of lock-in amplifier (4). Large Helmholtz coils (3) were used to induce the field H DC sourced by DC power supply (5). The amplitude of H AC was about 80 A/m and the DC field was varied up to 2400 A/m with a step of 79.62-159.24 A/m.…”

Section: Methodsmentioning

confidence: 99%

“…Then, the ME coefficient strongly depends on the condition of ferromagnetic-ferroelectric interfaces. For this reason, layered ferromagnetic/ferroelectric structures are efficient ME materials at room temperatures [5,6]. Among them, traditional Terfenol-D laminates with different piezoelectric materials demonstrate giant ME effect but they are not suitable for many applications where the use of high magnetic fields is prohibited due to its low magnetic susceptibility and high saturation fields.…”

Section: Introductionmentioning

confidence: 99%

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Direct Magnetoelectric Effect in a Sandwich Structure of PZT and Magnetostrictive Amorphous Microwires

et al. 2020

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The magnetoelectric (ME) response in a trilayer structure consisting of magnetostrictive Fe77.5B15Si17.5 amorphous microwires between two piezoelectric PZT (PbZr0.53Ti0.47O3) layers was investigated. Soft magnetic properties of wires make it possible to operate under weak bias magnetic fields below 400 A/m. Enhanced ME voltage coefficients were found when the microwires were excited by ac magnetic field of a frequency of 50–60 kHz, which corresponded to the frequency of electromechanical resonance. The as-prepared microwires were in a glass coat creating a large thermoelastic stress and forming a uniaxial magnetic anisotropy. The effect of glass-coat removal and wire annealing on ME coupling was investigated. The glass coat not only affects the wire magnetic structure but also prevents the interfacial bonding between the electric and magnetic subsystems. However, after its removal, the ME coefficient increased slightly less than 10%. Refining the micromagnetic structure and increasing the magnetostriction by stress release during wire annealing (before or after glass removal) strongly increases the ME response up to 100 mV/(cm × Oe) and reduces the characteristic DC magnetic field down to 240 A/m. Although the achieved ME coefficient is smaller than reported values for multilayered films with layers of PZT and soft magnetic alloys as Metglass, the proposed system is promising considering a small volume proportion of microwires.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Direct Magnetoelectric Effect in a Sandwich Structure of PZT and Magnetostrictive Amorphous Microwires

et al. 2020

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“…Four-node linear piezoelectric tetrahedron type elements were used by Comsol in the 3D case, while three-node linear piezoelectric triangular type elements were used for the 2D model. More details about this method can be found in reference [44].…”

Section: Simulation Of the Me Response Of Model Composite Layered Strmentioning

confidence: 99%

Selection and Optimization of a K0.5Na0.5NbO3-Based Material for Environmentally-Friendly Magnetoelectric Composites

et al. 2020

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Li- and Ta-modified K 0.5 Na 0.5 NbO 3 compounds are among the most promising lead-free ferroelectrics for high-sensitivity piezoelectric ceramic materials, and are potentially capable of replacing Pb(Zr,Ti)O 3 . They are also being investigated as piezoelectric components in environmentally friendly magnetoelectric composites. However, most suitable modifications for this application have not been identified. We report here a simulation study of how the magnetoelectric voltage responses of layered composite structures based on Li x (K 0.5 Na 0.5 ) 1 − x Nb 1 − y Ta y O 3 varies with the chemical composition of the piezoelectric. Instead of relying on material coefficients from the literature, which would have required using different sources, an ad hoc set of materials was prepared. This demanded tailoring preparation by conventional means to obtain dense ceramics while controlling alkali volatilization, perovskite phase and microstructure, as well as characterizing their dielectric, elastic and electromechanical properties. This provided the set of relevant material coefficients as a function of composition, which was used to obtain the magnetoelectric responses of model layered structures including a reference magnetostrictive spinel oxide by simulation. The piezoelectric material leading to the highest magnetoelectric coefficient was identified, and shown to be different to that showing the highest piezoelectric coefficient. This reflects the dependence of the magnetoelectric response on all material coefficients, along with the complex interplay between composition, processing and properties in K 0.5 Na 0.5 NbO 3 -based ceramics.

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“…The magnetoelectric (ME) effect [1,2], defined as an induced dielectric polarization under the effect of a magnetic field and/or induced magnetization under the action of an electric field, exhibits tremendous potential for applications such as magnetic-field sensors, transducers, energy harvesters, and memory devices [3,4,5]. Extensive research has been and is being performed on ME materials, both experimentally and theoretically [6,7,8,9,10,11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Modeling of a Magnetoelectric Laminate Ring Using Generalized Hamilton’s Principle

Zhang

et al. 2019

Materials

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The mathematical modeling of the magnetoelectric (ME) effect in ME laminates has been established for some simple structures. However, these methods, which are based on the differential equation approach, are difficult to use in other complex structures (e.g., ring structures). In this work, a new established approach based on the generalized Hamilton’s principle is used to analyze the ME effect in an ME laminated ring. Analytical expressions for ME voltage coefficients are derived. A comparison with the conventional method indicates that this approach is more convenient when the modeling analysis is performed on complex structures. Further, experimental data are also obtained to compare with the theoretical calculations in order to validate the new approach.

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Insights into the Performance of Magnetoelectric Ceramic Layered Composites

Cited by 6 publications

References 33 publications

Direct Magnetoelectric Effect in a Sandwich Structure of PZT and Magnetostrictive Amorphous Microwires

Direct Magnetoelectric Effect in a Sandwich Structure of PZT and Magnetostrictive Amorphous Microwires

Selection and Optimization of a K0.5Na0.5NbO3-Based Material for Environmentally-Friendly Magnetoelectric Composites

Modeling of a Magnetoelectric Laminate Ring Using Generalized Hamilton’s Principle

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