Enhancing weak magnetic field MME coupling in NdFeB magnet/piezoelectric composite cantilevers with stress concentration effect

Yu, Zhonghui; Chu, Zhaoqiang; Yang, Jikun; Asl, Mohammad Javad Pourhosseini; Li, Zhanmiao; Dong, Shuxiang

doi:10.1063/5.0043062

Cited by 13 publications

(15 citation statements)

References 18 publications

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“…Nevertheless, it should be noted that in [35][36][37][38][39][40][41][42][43][44][45][46][47][48] measurements were carried out either at a higher resonance frequency, ranging from units to tens of kHz, or far from resonance. We are aware of only two works [4,5] in which the magnitude of the ME effect at a similarly low resonance frequency exceeded the values of α we obtained.…”

Section: Discussionmentioning

confidence: 51%

“…To the best of our knowledge, the lowest reported fundamental bending resonance frequency of 27.8 Hz was achieved in ME sensors using the thin-film approach by direct spin coating of polyvinylidene fluoride-trifluoroethylene (PVDF-TrFE) onto a Metglas substrate [4]. A NdFeB magnet/piezoelectric composite cantilever with varying cross sections demonstrated a bending resonance frequency of 29 Hz and a high value for its ME voltage coefficient (≈500 V/A) [5]. A low resonance frequency in [5] was realized by employing a NdFeB permanent magnet as a tip mass.…”

Section: Introductionmentioning

confidence: 99%

“…A NdFeB magnet/piezoelectric composite cantilever with varying cross sections demonstrated a bending resonance frequency of 29 Hz and a high value for its ME voltage coefficient (≈500 V/A) [5]. A low resonance frequency in [5] was realized by employing a NdFeB permanent magnet as a tip mass. Several authors reported ME sensors operating at bending resonance frequency in the 100 Hz range by employing thin-film constituents [6][7][8][9][10] where the ferromagnetic material was an alloy.…”

Section: Introductionmentioning

confidence: 99%

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Resonant Magnetoelectric Effect at Low Frequencies in Layered Polymeric Cantilevers Containing a Magnetoactive Elastomer

et al. 2022

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In this work, the resonance enhancement of magnetoelectric (ME) coupling at the two lowest bending resonance frequencies was investigated in layered cantilever structures comprising a magnetoactive elastomer (MAE) slab and a commercially available piezoelectric polymer multilayer. A cantilever was fixed at one end in the horizontal plane and the magnetic field was applied horizontally. Five composite structures, each containing an MAE layer of different thicknesses from 0.85 to 4 mm, were fabricated. The fundamental bending resonance frequency in the absence of a magnetic field varied between roughly 23 and 55 Hz. It decreased with the increasing thickness of the MAE layer, which was explained by a simple theory. The largest ME voltage coefficient of about 7.85 V/A was measured in a sample where the thickness of the MAE layer was ≈2 mm. A significant increase in the bending resonance frequencies in the applied DC magnetic field of 240 kA/m up to 200% was observed. The results were compared with alternative designs for layered multiferroic structures. Directions for future research were also discussed.

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Section: Discussionmentioning

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Resonant Magnetoelectric Effect at Low Frequencies in Layered Polymeric Cantilevers Containing a Magnetoactive Elastomer

et al. 2022

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“…[1][2][3][4][5][6] It has been a challenge to continuously power those individual wireless sensors and the related electronic components in WSNs, because conventional batteries have their shortcoming of the finite lifetime. [7] Therefore, it becomes a promising and feasible approach to harvest energy from environmental energy source, including vibrational energy, [8,9] wave energy, [10] stray magnetic energy, [11,12] solar energy, [13] etc., to power these individual wireless sensor (as self-powered sensors). [7] The low-amplitude, low frequency stray magnetic field is widely surrounding in or around the modern building, generated by power supply cables and air conditioning machines et al; [5,7,14] while the vibrational energy coming from vehicle motions, human walking, and machines are also widespread in the environment.…”

Section: Introductionmentioning

confidence: 99%

“…Our group reported a NdFeB magnet/piezoelectric composite cantilever with varying stiffness for weak magnetic field H ac energy harvesting, and we found that a weak H ac of as low as 0.2 Oe could be still strong enough to drive four LEDs lighting. [12] Lim et al [6] proposed a magneto-mechano-triboelectric nanogenerator (MMTEG) combining triboelectric effect with magnetic force-torque effect, realizing maximum peak power of 21.8 mW under H ac = 7 Oe. [6] Currently, researches in energy harvesting field mainly focus on the improvements in composite materials and structures, and/or the introduction of new physical mechanism.…”

Section: Introductionmentioning

confidence: 99%

A PMNN‐PZT Piezoceramic Based Magneto‐Mechano‐Electric Coupled Energy Harvester

Yang

Cao

et al. 2022

Adv Funct Materials

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It is desired to obtain a piezoceramic with a high piezoelectric coefficient and low dielectric loss simultaneously for energy harvester application. Herein, it is reported that the 0.025Pb(Mn1/3Nb2/3)O3‐0.525Pb(Ni1/3Nb2/3)O3‐0.135PbZrO3‐0.315PbTiO3 (PMNN‐PZT) ceramic exhibits superior piezoelectric charge parameter e33 of 37.74 pC m−2 and low dielectric loss tanδ of 0.45%. Furthermore, a PMNN‐PZT ceramic‐based magneto‐mechano‐electric coupled energy harvester (MMEC‐EH) with a varying‐stiffness cantilever is designed and fabricated, which shows the strong self‐resonance effect in response to a random, transient impulse vibration or magnetic field stimulus. The investigations show that under a 0.6 s pulse vibration stimulus, the MMEC‐EH can tune itself into self‐resonance damping oscillation lasting for six seconds at its resonance frequency of 16 Hz, and the produced maximum power is 1.96 mWRMS. Under both weak magnetic field and force‐field dual‐stimulus (Hac = 0.5 Oe and a = 0.05 g), the generated power density is about 60 mWRMS Oe−2g−2cm−3, which is one to two orders of magnitude higher than those previously reported MMEC‐EHs. Finally, the MMEC‐EH is successfully demonstrated to power temperature/humidity sensors, indicating its potential for harvesting both weak vibration and magnetic field energy from environments for self‐powered sensor application.

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Significant Output Power Enhancement in Symmetric Dual‐Mode Magneto‐Mechano‐Electric Coupled Resonators

Qiu

Chu

et al. 2022

Advanced Energy Materials

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The microenergy harvesting based on magneto‐mechano‐electric (MME) coupling is an emerging technology for powering wireless Internet of Things (IoT) devices because it is capable of simultaneously harvesting magnetic field energy and mechanical energy. However, further improvement in output power of conventional cantilever‐structured MME energy harvesters has met with considerable difficulties due to the inherent, high mechanical energy loss in single‐mode operation. To solve the predicament, here, this work presents a symmetric, mechanical coupled dual‐mode MME energy harvester for restricting clamp loss and then enhancing MME coupling and output power. Under a weak AC magnetic field (Hac = 4 Oe) at 60 Hz, the MME energy harvester operating in symmetric dual‐mode can generate a peak‐peak output power of 72 mWpp (root‐mean‐square value: 9 mWRMS), a 437% enhancement over a conventional single‐mode MME energy harvester, which can even drive 160 light emitting diodes (LEDs) lighting directly. A realistic application furtherly shows that the symmetric dual‐mode MME energy harvester can successfully scavenge the magnetic field energy around a household appliance, and the generated electric power can directly drive a wireless IoT system in real time. The proposed concept of symmetric dual‐mode in this work can open new avenues for future vibration‐based energy harvesters design.

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Enhancing weak magnetic field MME coupling in NdFeB magnet/piezoelectric composite cantilevers with stress concentration effect

Cited by 13 publications

References 18 publications

Resonant Magnetoelectric Effect at Low Frequencies in Layered Polymeric Cantilevers Containing a Magnetoactive Elastomer

Resonant Magnetoelectric Effect at Low Frequencies in Layered Polymeric Cantilevers Containing a Magnetoactive Elastomer

A PMNN‐PZT Piezoceramic Based Magneto‐Mechano‐Electric Coupled Energy Harvester

Significant Output Power Enhancement in Symmetric Dual‐Mode Magneto‐Mechano‐Electric Coupled Resonators

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