Driven-Voltage Permeability Variation Measurements of Bilayered Magnetostrictive/Piezoelectric Materials &amp;for Tunable Microwave Applications

Blasi, Serge De; Quéffélec, Patrick; Dubourg, S.; Бодин, О. Н.; Ledieu, M.

doi:10.1109/tmag.2007.893789

Cited by 4 publications

(1 citation statement)

References 11 publications

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“…A bilayered composite material consisting of a ferromagnetic layer of FeCoSiB and piezoelectric substrate of lead zirconate titanate (PZT) can be used for tunable microwave applications as the permeability of this magnetostrictive/piezoelectric composite varies with different DC voltages. 176 Ferromagnetic microwires exhibit giant magneto impedance, low coercivity and high saturation magnetization. Glass-coated ferromagnetic microwires are reported to be suitable for designing microwave energy sensors based on their microwave absorption properties.…”

Section: Tunable Materialsmentioning

confidence: 99%

Applications of Microwave Materials: A Review

Raveendran

Sebastian

Raman

2019

Journal of Elec Materi

147

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The performance of microwave devices mainly depends on the properties of materials used in the fabrication. Knowledge of material properties at microwave frequencies is a prerequisite to select suitable materials for various microwave applications and vice versa. In this review, seven categories of materials and their applications in a microwave regime are elaborately discussed. The categories include magnetic materials, carbon-based materials, flexible or stretchable materials, biomaterials, phantoms, tunable materials and metamaterials. A brief overview of other important microwave materials such as low-loss ceramic dielectric materials, low-loss polymer ceramic composites, glass ceramics and multilayer ceramics is also given. The objective of this review is to expose the world of materials for wide microwave applications and thereby properly assisting the material selection for specific applications. Moreover, this review has dual significance. It helps material scientists to develop new materials and modify the properties of the available materials with respect to the application requirements. It also assists microwave engineers to select and use appropriate materials for different microwave applications.

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Section: Tunable Materialsmentioning

confidence: 99%

Applications of Microwave Materials: A Review

Raveendran

Sebastian

Raman

2019

Journal of Elec Materi

147

View full text Add to dashboard Cite

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Magnetodielectric effect in trilayered Co65Fe35B20/PVDF/Co65Fe35B20 composite materials. Prediction and measurement for tunable microwave applications

Rasoanoavy

Laur

Blasi

et al. 2010

Journal of Applied Physics

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The variation in the permeability of a multilayered polyvinylidene fluoride/CoFeB (piezoelectric/magnetostrictive) composite material under the action of a dc voltage is demonstrated. The driven-voltage permeability is first predicted using a finite element method-based multiphysics calculation. The simulation allows us to determine a magnetic anisotropy field of 45 Oe induced in the ferromagnetic layers by the mechanical coupling between magnetostrictive and piezoelectric layers due to the applied dc voltage. A variation of 30% for the permeability of the ferromagnetic layers is then measured using a radiofrequency permeameter and under the application of a dc voltage of 15 V applied on the ferromagnetic layers, which also act as electrodes for the bias of the polyvinylidene fluoride (PVDF). An additional measurement of the trilayered structure under the application of a dc magnetic field is finally performed to evaluate the magnetic field needed to get a 30% variation in the magnetic layers permeability in order to compare this value to the one predicted by multiphysics calculation. These experimental results are in good agreement with calculations and are very encouraging for the application of the CoFeB/PVDF/CoFeB composite material to ensure the tunability of microwave devices (filters, phase shifters, antennas, etc.)

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Adjustable ferromagnetic resonance frequency in CoO/CoFeB system

Bonneau-Brault

Dubourg

Thiaville

et al. 2015

Journal of Applied Physics

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Static and dynamic properties of (CoO/CoFeB)n multilayers have been investigated. An anisotropy field enhancement was evidenced when the CoO layer was deposited under the CoFeB layer. Tuning the relative CoFeB and CoO layers thicknesses, high ferromagnetic resonance frequencies up to 4 GHz were achieved. The coupling effect between the CoO and CoFeB layers was induced by a dipolar coupling due to the anisotropic roughness topology of the CoO layer. This anisotropic roughness was induced by the deposition geometry and evidenced by atomic force microscopy. The strength of the dipolar interfacial coupling was calculated thanks to Schlömann's model. Multilayer stacks were fabricated and the magnetic properties observed for the trilayers could be maintained.

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Driven-Voltage Permeability Variation Measurements of Bilayered Magnetostrictive/Piezoelectric Materials &for Tunable Microwave Applications

Cited by 4 publications

References 11 publications

Applications of Microwave Materials: A Review

Applications of Microwave Materials: A Review

Magnetodielectric effect in trilayered Co65Fe35B20/PVDF/Co65Fe35B20 composite materials. Prediction and measurement for tunable microwave applications

Adjustable ferromagnetic resonance frequency in CoO/CoFeB system

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