Highly efficient solid state magnetoelectric gyrators

Leung, Chung Ming; Zhuang, Xin; Friedrichs, Daniel; Li, Jiefang; Erickson, Robert W.; Лалетин, В. М.; Popov, M. A.; Srinivasan, G.; Viehland, Dwight

doi:10.1063/1.4996242

Cited by 38 publications

(19 citation statements)

References 13 publications

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“…Recently, the progress made in the field of magnetoelectric (ME) laminate composites allows potential high performance applications such as magnetic field sensors [2][3][4][5], current sensors [6][7][8][9][10][11][12][13][14][15][16], gyrators [17], filters [18] and more recently, memory devices [19][20][21][22][23]. In the field of current sensors, magnetoelectric composites show many advantages : (i) high performances, (ii) low cost, (iii) power supply free, (iv) galvanic isolation and (v) simplified electronic circuits [24].…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetoelectric voltage in ferrite/PZT/ferrite composite for AC current sensor application

Aubert

Loyau

Chaplier

et al. 2018

J Mater Sci: Mater Electron

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In this paper, we report the fabrication of a rare-earth free current sensor based on a PZT/NiCoZn-ferrite magnetoelectric (ME) trilayer composite disk. To improve the sensitivity of the sensor, the structure uses an in-plane series connection, which increases the ME voltage by two for a fixed volume. Then, we propose a full characterization of the sensor : electrical modeling, low and high frequency limits, sensitivity, linearity, distortion and resolution. The device is also evaluated under sinus, square, and triangle waveform currents, which are excitation signals commonly used in the field of electrical engineering. The current sensor shows high current sensitivity (90 mV/A), good linearity from 0.001 A to 30 A and low added impedance (0.01 Ω) in a frequency range of 10 Hz-30 kHz for a very compact structure (4 cm 3 ). It also exhibits a high resolution of 1 mA (for a 1 A peak signal) and good stability.

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Section: Introductionmentioning

confidence: 99%

Enhanced magnetoelectric voltage in ferrite/PZT/ferrite composite for AC current sensor application

Aubert

Loyau

Chaplier

et al. 2018

J Mater Sci: Mater Electron

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“…These results indicated that the thickness ratio between two ferromagnetic phases (nickel‐zinc ferrite and Metglas) plays an important role towards power efficiency working under H Bias = 0 or higher optimal magnetic bias. Under resonance, the maximum power efficiency ( η max ) was dependent on Q m , given as:

η_{\max} = \frac{1}{1 + 2 ω_{s} R_{1} \times \frac{φ_{m}^{2}}{φ_{p}^{2}}}

where

R_{1} = \frac{R_{m}}{φ_{m}^{2}}

is the equivalent resistance;

R_{m} = \frac{π Z_{0}}{8 Q_{m}}

is the mechanical resistance;

Z_{0} = \overset{ρ v}{true} A_{l a m}

is the impedance;

ω_{s} = \frac{1}{L_{m} C_{m}}

is the angular frequency when the ME gyrator is operated under resonance;

φ_{m} = 2 A_{m} \frac{d_{33, m}^{}}{s_{33}^{H}}

and

φ_{p} = \frac{w d_{31, p}^{}}{s_{11}^{E}}

are the magneto‐elastic and elasto‐electric coupling factors, respectively. Figure shows the dependence of the power efficiency ( η ) on the number of Metglas foils ( n ).…”

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confidence: 99%

A Highly Efficient Self‐Biased Nickel‐Zinc Ferrite/Metglas/PZT Magnetoelectric Gyrator

Leung

Sreenivasulu

Zhuang

et al. 2018

Physica Rapid Research Ltrs

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A high efficiency self‐biased magnetoelectric (ME) gyrator operating under zero magnetic bias field (HBias = 0) was developed. It consists of a three‐phase nickel‐zinc ferrite/Metglas/piezoelectric longitudinal–transverse (L‐T) ME laminate and a solenoid. Laminates with different length–width (L/W) ratios, together with various thickness (number of Metglas foils) ratios between ferrite and Metglas layers, were studied. A maximum power conversion efficiency (η) of 72% was found at the fundamental electromechanical resonance for a high L/W ratio of 18.7. The high zero‐bias η could be attributed to a higher mechanical quality factor (Qm) and the low demagnetization effect (Nz) of nickel‐zinc ferrite laminates of higher L/W. Eliminating the external magnetic bias will facilitate miniaturization of ME gyrators for use in portable electronics and medical applications.

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“…For ME gyrators that have a design similar to ME transformers, it was shown that, by optimizing the size and parameters of the composite structure, it is possible to increase the power transfer efficiency up to η ≈ 90% [26][27][28][29]. One can hope that similar increase in the power transfer efficiency can be realized for the ME transformers as well.…”

Section: Ways To Improve Characteristics Of the Magnetoelectric Transmentioning

confidence: 99%

Ceramic-Heterostructure-Based Magnetoelectric Voltage Transformer with an Adjustable Transformation Ratio

et al. 2020

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A voltage transformer employing the magnetoelectric effect in a composite ceramic heterostructure with layers of a magnetostrictive nickel–cobalt ferrite and a piezoelectric lead zirconate–titanate is described. In contrast to electromagnetic and piezoelectric transformers, a unique feature of the presented transformer is the possibility of tuning the voltage transformation ratio K using a dc magnetic field. The dependences of the transformer characteristics on the frequency and the amplitude of the input voltage, the strength of the control magnetic field and the load resistance are investigated. The transformer operates in the voltage range between 0 and 112 V, and the voltage transformation ratio K is tuned between 0 and 14.1 when the control field H changes between 0 and 6.4 kA/m. The power at the transformer output reached 63 mW, and the power conversion efficiency was 34%. The methods for calculation of the frequency response, and the field and load characteristics of the transformer are proposed. The ways to improve performance characteristics of magnetoelectric transformers and their possible application areas are discussed.

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Highly efficient solid state magnetoelectric gyrators

Cited by 38 publications

References 13 publications

Enhanced magnetoelectric voltage in ferrite/PZT/ferrite composite for AC current sensor application

Enhanced magnetoelectric voltage in ferrite/PZT/ferrite composite for AC current sensor application

A Highly Efficient Self‐Biased Nickel‐Zinc Ferrite/Metglas/PZT Magnetoelectric Gyrator

Ceramic-Heterostructure-Based Magnetoelectric Voltage Transformer with an Adjustable Transformation Ratio

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