A permendur-piezoelectric multiferroic composite for low-noise ultrasensitive magnetic field sensors

Sreenivasulu, G.; Laletin, U.; Петров, В. М.; Petrov, V. V.; Srinivasan, G.

doi:10.1063/1.4705305

Cited by 45 publications

(18 citation statements)

References 22 publications

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“…This strain is coupled into the PE layer via the bonding layer. Many enhancements have been carried out choosing the material and adjusting the ratio between the MS and PE phases of the composite [3]- [6]. Thereafter, noise sources in the laminate have been investigated to evaluate the expected noise performance for magnetic sensor applications.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity and Noise Evaluation of a Bonded Magneto(elasto) Electric Laminated Sensor Based on In-Plane Magnetocapacitance Effect for Quasi-Static Magnetic Field Sensing

et al. 2015

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The quasi-static magnetic field detection of a layer-bonded magneto(elasto) electric (ME) laminate has been investigated by measuring the in-plane electric capacitance via its interdigital electrodes close to the piezoelectric resonant frequency. The MElayered composite is considered as a stress-induced dielectric effect because there is practically no direct response of the electric capacitance to an external magnetic field. The sensitivity is dominated by the magnetoelastic coupling in the magnetic layer and on the stress induced by the permittivity change in the piezoelectric layer. The low-frequency magnetocapacitance effect is sensitive to an external magnetic bias which can modulate the electric permittivity by producing a stress. The magnetoelastic coupling is another important parameter for this magnetic field detection mode. For a given magnetic field, the amplitude of the magnetostriction is directly related to this parameter as well. Therefore, an optimal magnetic bias can maximize the induced strain or stress which is coupled into the piezoelectric layer through the change of the electric permittivity in this layer. To evaluate the sensitivity and the noise performance by the magnetocapacitance effect, we have used the piezoelectric and magnetic constitutive equations to predict the permittivity dependence. Experimentally, this sensor achieved an equivalent magnetic noise spectral density, presently still limited, by the noise of the detection electronics, ∼100 pT/ √ Hz at 1 Hz and offered a dc detection capability. With the model and experimental nonlinear factors, an equivalent sensor noise spectral density close to the pT/ √ Hz can be ultimately predicted considering the mechanical loss limitation of the sensor.

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Section: Introductionmentioning

confidence: 99%

Sensitivity and Noise Evaluation of a Bonded Magneto(elasto) Electric Laminated Sensor Based on In-Plane Magnetocapacitance Effect for Quasi-Static Magnetic Field Sensing

et al. 2015

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“…11 Permendur (P), an alloy with 49% Fe, 49% Co, and 2% V (obtained from the Institute of Technical Acoustics, Vitebsk, Belarus), with high magnetostriction (k % 70 ppm) and high piezomagnetic coefficient (q % 1 Â 10 À6 /Oe) was used for the ferromagnetic phase in the composites. 12 Permendur of similar lateral dimensions as LGT and 0.16 mm in thickness were used in LGT-P bilayers and P-LGT-P trilayers. Platelets of P and LGT were bonded with a 2 lm thick epoxy that was cured at 40 C. We also prepared similar bilayers and trilayers of P and 25 Thus the thickness fraction of ferromagnetic and ferroelectric (or piezoelectric) layers for the 3 samples is approximately equal, although PMN-PT could only be obtained with a maximum length of 20 mm.…”

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confidence: 99%

Piezoelectric single crystal langatate and ferromagnetic composites: Studies on low-frequency and resonance magnetoelectric effects

Sreenivasulu

Fetisov

et al. 2012

Applied Physics Letters

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Synthesis and room temperature four-state memory prototype of Sr3Co2Fe24O41 multiferroics Appl. Phys. Lett. 101, 122903 (2012) Modeling of resonant magneto-electric effect in a magnetostrictive and piezoelectric laminate composite structure coupled by a bonding material J. Appl. Phys. 112, 064109 (2012) Multiferroic properties of Aurivillius phase Bi6Fe2−xCoxTi3O18 thin films prepared by a chemical solution deposition route Appl. Phys. Lett. 101, 122402 (2012) Effect of microstructure on the electromagnetic properties of Al18B4O33w/Co and Al18B4O33w/FeCo composite particles Mechanical strain mediated magnetoelectric (ME) effects are studied in bilayers and trilayers of piezoelectric single-crystal lanthanum gallium tantalate (LGT) and magnetostrictive permendur (P). The ME voltage coefficient ranges from 2.3 V/cm Oe at 20 Hz to 720 V/cm Oe at bending resonance and is higher by an order of magnitude than in composites with ferroelectric lead zirconate titanate or lead magnesium niobate-lead titanate. The low-frequency magnetic noise for P-LGT-P is a factor of 2-10 smaller than for ferroelectrics based composites. Langatate is free of ferroelectric hysteresis, pyroelectric effects, and phase transitions up to 1450 C and is of interest for ultrasensitive, high temperature magnetic sensors.

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“…1 The combination of such magnetostrictive materials with piezoelectric phases enables the formation of magnetoelectric (ME) composites exhibiting a high potential for magnetic sensing applications due to their limits of detection in the pT/ͱHz range. 2,3 The highest sensitivities are obtained in presence of externally applied magnetic bias fields, 4 which may cause unwanted perturbation to adjacent sensors and results in lower spatial resolution of sensor arrays. Recently, we demonstrated that this drawback can be overcome via the successful integration of bias fields with the exchange bias (EB) effect.…”

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confidence: 99%

Amorphous FeCoSiB for exchange bias coupled and decoupled magnetoelectric multilayer systems: Real-structure and magnetic properties

Hrkac

Lage

Köppel

et al. 2014

Journal of Applied Physics

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The effect of field annealing for exchanged biased multilayer films is studied with respect to the resultant structural and magnetic film properties. The presented multilayer stacks comprise repeating sequences of Ta/Cu/{1 1 1} textured antiferromagnetic Mn70Ir30/amorphous ferromagnetic Fe70.2Co7.8Si12B10. Within the ferromagnetic layers crystalline filaments are observed. An additional Ta layer between the antiferromagnet and ferromagnet is used in order to investigate and separate the influence of the common Mn70Ir30/Fe70.2Co7.8Si12B10 interface on the occurring filaments and structural changes. In situ and ex situ transmission electron microscopy is used for a comprehensive structure characterization of multilayer stacks for selected temperature stages. Up to 250 °C, the multilayers are structurally unaltered and preserve the as-deposited condition. A deliberate increase to 350 °C exhibits different crystallization processes for the films, depending on the presence of crystal nuclei within the amorphous ferromagnetic layer. The influence of volume-to-surface ratio of the multilayer stacks to the crystallization process is emphasized by the comparison of in situ and ex situ investigations as the respective specimen thickness is changed. Complementary magnetic studies reveal a defined exchange bias obtained at the first annealing step and a decrease of total anisotropy field with partial crystallization after the subsequent annealing at 350 °C.

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A permendur-piezoelectric multiferroic composite for low-noise ultrasensitive magnetic field sensors

Cited by 45 publications

References 22 publications

Sensitivity and Noise Evaluation of a Bonded Magneto(elasto) Electric Laminated Sensor Based on In-Plane Magnetocapacitance Effect for Quasi-Static Magnetic Field Sensing

Sensitivity and Noise Evaluation of a Bonded Magneto(elasto) Electric Laminated Sensor Based on In-Plane Magnetocapacitance Effect for Quasi-Static Magnetic Field Sensing

Piezoelectric single crystal langatate and ferromagnetic composites: Studies on low-frequency and resonance magnetoelectric effects

Amorphous FeCoSiB for exchange bias coupled and decoupled magnetoelectric multilayer systems: Real-structure and magnetic properties

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