Giant magnetoelectric effect in magnet-cymbal-solenoid current-to-voltage conversion device

Zeng, Min; Or, Siu Wing; Chan, Helen Lai Wa

doi:10.1063/1.3372759

Cited by 10 publications

(4 citation statements)

References 15 publications

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“…It varies in the range of 0.68 V/A to 0.83 V/A, with an average value of 0.77 V/A. The results show that the heterostructure has the potential to produce large magnetoelectric effect without using magnetostrictive materials and bias magnetic field [27,28].…”

Section: Resultsmentioning

confidence: 99%

A Shear-Mode Piezoelectric Heterostructure for Electric Current Sensing in Electric Power Grids

Yang²

2019

Micromachines

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This paper presents a shear-mode piezoelectric current sensing device for two-wire power cords in electric power grids. The piezoelectric heterostructure consists of a cymbal structure and a permalloy plate. The cymbal structure is constructed from a permanent magnet, a brass cap, and shear-mode piezoelectric materials. The permalloy plate concentrates the magnetic field generated by the two-wire power cord on the magnet. Under the force amplification effect of the cymbal structure, the response of the device is improved. A prototype has been fabricated to conduct the experiments. The experimental average sensitivity of the device is 12.74 mV/A in the current range of 1–10 A with a separating distance of d = 0 mm, and the resolution reaches 0.04 A. The accuracy is calculated to be ±0.0177 mV at 1.5 A according to the experimental voltage distribution. The current-to-voltage results demonstrate that the proposed heterostructure can also be used as a magnetoelectric device without bias.

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Section: Resultsmentioning

confidence: 99%

A Shear-Mode Piezoelectric Heterostructure for Electric Current Sensing in Electric Power Grids

Yang²

2019

Micromachines

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“…Recently, the extrinsic ME effect was realized in multiphase magnet-piezoelectric composites which is not influenced by interface condition. [12][13][14][15] In this work, we report a large ME coupling obtained from a structure mechanically mediated by a stretching force and made up of a magnetostrictive TbFe 2 flake, two piezoelectric Pb͑Zr, Ti͒O 3 ͑PZT͒ flakes, and two nonmagnetic flakes. The proposed structure features an improved stretching stress coupling between the TbFe 2 and PZT flakes.…”

mentioning

confidence: 90%

“…The proposed structure features an improved stretching stress coupling between the TbFe 2 and PZT flakes. And it is simple and more similar to the classical one than the multiphase magnet-piezoelectric composites, [12][13][14][15] which is advantageous for practical applications.…”

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confidence: 99%

Large magnetoelectric effect in mechanically mediated structure of TbFe2, Pb(Zr,Ti)O3, and nonmagnetic flakes

Wang

Pan

et al. 2011

Applied Physics Letters

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Magnetoelectric ͑ME͒ effect has been studied in a structure of a magnetostrictive TbFe 2 alloy, two piezoelectric Pb͑Zr, Ti͒O 3 ͑PZT͒ ceramics, and two nonmagnetic flakes. The ME coupling originates from the magnetic-mechanical-electric transform of the magnetostrictive effect in TbFe 2 and the piezoelectric effect in PZT by end bonding, instead of interface bonding. Large ME coefficients of 10.5 and 9.9 V cm −1 Oe −1 were obtained at the first planar acoustic and third bending resonance frequencies, which are larger than that of conventional layered TbFe 2 / PZT composites. The results show that the large ME coupling can be achieved without interface coupling. © 2011 American Institute of Physics. ͓doi:10.1063/1.3574004͔Magnetoelectric ͑ME͒ materials have stimulated tremendous fundamental and practical interests due to their potential applications in the fields of sensors, actuators, and transducers. [1][2][3][4] Hereinto, layered ME composites exhibit excellent ME effect at room temperature compared to single phase materials and multiphase bulk composites. [5][6][7][8][9] The ME effect in layered ME composites is a product property of the magnetostrictive and piezoelectric effects. For most investigations on layered ME composites, the classical structure is laminated with layers by interface bonding. A magnetic field applied to the layered ME composites will induce strain in the magnetostrictive layer which is passed along to the piezoelectric layer by interface coupling, where it induces an electric polarization. 10 Therefore, the interface coupling is a key factor that determines the ME coupling of layered composites. 11 However, in practice, there is no ideal interface for layered ME composites, which reduces the ME coupling.Large ME effect is not limited to be produced by interface coupling between magnetostrictive and piezoelectric phases, but will rather appear in the case when a magnetic force can mechanically act on a piezoelectric phase. Recently, the extrinsic ME effect was realized in multiphase magnet-piezoelectric composites which is not influenced by interface condition. [12][13][14][15] In this work, we report a large ME coupling obtained from a structure mechanically mediated by a stretching force and made up of a magnetostrictive TbFe 2 flake, two piezoelectric Pb͑Zr, Ti͒O 3 ͑PZT͒ flakes, and two nonmagnetic flakes. The proposed structure features an improved stretching stress coupling between the TbFe 2 and PZT flakes. And it is simple and more similar to the classical one than the multiphase magnet-piezoelectric composites, 12-15 which is advantageous for practical applications.The proposed ME structure, as shown in Fig. 1͑a͒, is made up of a magnetostrictive TbFe 2 flake, two piezoelectric PZT flakes, and two nonmagnetic ͑glass͒ flakes. The TbFe 2 flake was prepared by arc melting under argon atmosphere with dimensions of 15ϫ 6 ϫ 3.5 mm 3 ͑l ϫ w ϫ t͒. The commercial PZT flakes were sliced with dimensions of 15ϫ 6 ϫ 0.6 mm 3 and polarized along the thickness direction. Their dielectric, piez...

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“…16 Besides utilizing the product property of magnetostrictive and piezoelectric effects mentioned above, the extrinsic ME effect can also be realized in multiphase magnet-piezoelectric composites using the direct coupling of the magnetic attractive/repellent force effect in the magnet phase with the piezoelectric effect in the piezoelectric phase, which is not influenced by interface condition. [17][18][19][20] In this work, we report a large ME coupling obtained from a very simple bi-rectangular structure made up of epoxy-bonded negative/positive magnetostrictive and piezoelectric flakes.…”

Section: Introductionmentioning

confidence: 99%

Magnetoelectric effect in a bi-rectangular structure composed of negative/positive magnetostrictive and piezoelectric flakes

Wang

Pan

et al. 2011

J. Mater. Res.

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Magnetoelectric (ME) effect has been studied in bi-rectangular structure made up of epoxy-bonded negative/positive magnetostrictive and piezoelectric flakes. The ME effect is affected by negative and positive magnetostrictive flakes. The ME voltage coefficient at resonance frequency shows a nearly constant plateau behavior with the bias magnetic field increased from 1 to 3.5 kOe. There is no interface between magnetostrictive and piezoelectric flakes required to achieve ME coupling, which provides a new choice to make ME devices.

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Giant magnetoelectric effect in magnet-cymbal-solenoid current-to-voltage conversion device

Cited by 10 publications

References 15 publications

A Shear-Mode Piezoelectric Heterostructure for Electric Current Sensing in Electric Power Grids

A Shear-Mode Piezoelectric Heterostructure for Electric Current Sensing in Electric Power Grids

Large magnetoelectric effect in mechanically mediated structure of TbFe2, Pb(Zr,Ti)O3, and nonmagnetic flakes

Magnetoelectric effect in a bi-rectangular structure composed of negative/positive magnetostrictive and piezoelectric flakes

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