Status and Perspectives of Multiferroic Magnetoelectric Composite Materials and Applications

Palneedi, Haribabu; Annapureddy, Venkateswarlu; Priya, Shashank; Ryu, Jungho

doi:10.3390/act5010009

Cited by 406 publications

(236 citation statements)

References 143 publications

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“…In this contemporary era of device miniaturization and device multi-functionality, magnetoelectric (ME) composites have enticed the science fraternity towards themselves owing to their large ME coupling with respect to their single phase counterparts. Presence of large ME effect in composite materials has compelled the researchers to exploit their use in diverse applications including: spintronic devices [1,2], high sensitivity magnetic field sensors [3], sensors and transducers [4,5], and electric field controlled ferromagnetic resonance…”

Section: Introductionmentioning

confidence: 99%

Investigation of magnetoelectric effect in lead free K0.5Na0.5NbO3-BaFe12O19 novel composite system

2019

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Lead-free magnetoelectric composites (1 ̶ x)K 0.5 Na 0.5 NbO 3 -(x)BaFe 12 O 19 (x = 30, 40, and 50 wt%) are synthesized using solid state reaction method. X-ray diffraction (XRD) patterns confirm formation of diphase composites. Field emission scanning electron microscopy (FE-SEM) gives information about grain size, connectivity, and microstructure of constituent phases. Dielectric parameters of composite samples are studied as a function of temperature and the transition temperatures corresponding to both the constituent phases are observed in the composite samples. Dielectric constant has been found to decrease with addition of ferrite. Room temperature multiferroic behaviour has been confirmed using P-E and M-H hysteresis loops and magnetoelectric measurement. Polarization is found to decrease; however, magnetization increases with ferrite weight percentage. The highest α ME of 4.08 mV/(cm⋅Oe) is obtained for x = 30 wt% composite and it is realized that ferrite content significantly affects magnetoelectric behaviour.devices [6]. Large scale applications of ME composites given their higher ME coupling than that of single phase materials make them a beguiling research concern. ME coupling in the composites is basically a product property arising due to combination of magnetostrictive (magnetic/mechanical) phenomena in ferrite and piezoelectric (meachanical/electrical) phenomena of ferroelectric phases [7]. ) x [12], etc. are studied in the previous years. Generally for fabrication of good ME composites, the piezoelectric and magnetostrictive coefficients of constituent ferroelectric and ferrite phases should be high respectively. Furthermore high resistivity is equally desirable for avoiding leakage of charges [13]. K 0.5 Na 0.5 NbO 3 (KNN) has been considered as a bright prospect as a ferroelectric constituent for fabrication of lead-free ME composites. KNN exhibits reasonably well ferroelectric, piezoelectric, and dielectric characteristics. It exhibits high piezoelectric charge constant (d 33 ≈ 80-416 pC/N) and a high planar coupling coefficient (k P ≈ 45%) [14][15][16]. It also exhibits large remnant polarization and coercive field (P r = 21 μC/cm 2 , E c = 7.2 kV/cm, P r = 20 μC/cm 2 , and E c = 8 kV/cm) [14,17]. The M-type hexaferrites are widely studied materials due to their unique physical properties. The hexagonal ferrites including BaFe 12 O 19 (BHF) have magneto-plumbite structure. The crystal structure of BHF and diamagnetically doped BHF may be described by two space group viz. P6 3 /mmc (No. 194) and P6 3 mc (No. 186). The latter one is a non-centrosymmetric space group and is generally used to describe the crystal structure in order to explain the existence of non-zero spontaneous polarization [18,19]. These ferrites are usually termed as hard ferrites because of their high electrical resistivity, saturation magnetization, coercivity, and mechanical hardness [20]. At higher frequencies, hexaferrites have low-eddy current losses and high resistivity as compared to other magnetic materials [21]. ...

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Section: Introductionmentioning

confidence: 99%

Investigation of magnetoelectric effect in lead free K0.5Na0.5NbO3-BaFe12O19 novel composite system

2019

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Low‐Loss Piezoelectric Single‐Crystal Fibers for Enhanced Magnetic Energy Harvesting with Magnetoelectric Composite

Annapureddy

Kim

Palneedi

et al. 2016

Advanced Energy Materials

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109

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The concept of magneto-mechano-electric (MME) energy conversion has been demonstrated using a magnetoelectric (ME) composite, with cantilever structure working at resonating mode, to reliably covert low-frequency magnetic noise fields to electric power. [19,20] This process is the result of multiple energy transductions starting from magnetic energy to mechanical energy and then to electrical energy. An MME generator is known to be more efficient than an electromagnetic generator at a small scale in a low frequency magnetic field. A serious of rationally designed MME generators with piezoelectric single crystals had shown great potential for scavenging weak and irregular magnetic energy. [19][20][21][22] The harvesting performance of piezoelectric-based energy harvesters is directly related to the product of the piezoelectric strain constant, d ij and the piezoelectric voltage constant, g ij (the mathematical product of which is called the figure of merit: FOM = d ij × g ij ), under constant applied stress. [19] However, recent investigations have determined that FOM could not explain completely the output performance of such energy harvesters. [19,23] This is because the hysteresis (or non-linearity) of the piezoelectric materials is related to losses such as dielectric loss (inverse of electrical quality factor) and mechanical loss (inverse of mechanical quality factor); and consequently, performance degradation of the device. Therefore, to improve the harvesting performance, it is important to know how the loss factors affect the harvested output power in MME generators.To provide the answer, various piezoelectric PMN-PZT single crystal thin sheets; namely, high-loss PMN-PZT, medium-loss PMN-PZT, and low-loss PMN-PZT with the typical rhombohedral perovskite phase close to the morphotropic phase boundary (MPB), were grown using the solid-state-crystal growth (SSCG) method (see Data S1 in the Supporting information). This greatly improved the desired properties. In this study, we fabricated three MME generators using ME composites with these PMN-PZT single crystalline materials in macro-fibers form, and a magnetostrictive Ni plate. In this paper, the MME generators embedded with high-loss PMN-PZT, medium-loss PMN-PZT, and low-loss PMN-PZT, were identified as highloss, medium-loss, and low-loss (respectively) MME generators. Using them, we eventually succeeded in finding a way to extract significantly improved electric power sufficient to realize a self-powered energy device. Variation in the properties of the piezoelectric PMN-PZT single-crystal macro-fibers (SCMFs) results in a substantial change in the output voltage, the energy harvesting characteristics, and the power density of the device.We are entering an era when electrical energy scavenged from the irregular energy resources that are found ubiquitously in our living environment (e.g., light, vibrations, motion, heat, and magnetic fields) can be used to operate small electronic devices that do extraordinary tasks. [1][2][3][4][5][6][7][8] The needs of th...

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“…The ME coefficient can be significantly increased through improving materials properties. There are claims of the coefficient value above 1 V cm −1 Oe −1 (Palneedi et al 2016). Further, the ME coefficient can be increased through a dc field biasing (Islam et al 2008).…”

Section: Wireless Stimulation Of Central and Peripheral Nervous Systementioning

confidence: 99%

Technobiology’s Enabler: The Magnetoelectric Nanoparticle

Khizroev

2018

Cold Spring Harb Perspect Med

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To enable patient-and disease-specific diagnostic and treatment at the intracellular level in real time, it is imperative to engineer a perfect way to locally stimulate selected individual neurons, navigate and dispense a cargo of biomolecules into damaged cells or image sites with relatively high efficacy and with adequate spatial and temporal resolutions. Significant progress has been made using biotechnology; especially with the development of bioinformatics, there are endless molecular databases to identify biomolecules to target almost any disease-specific biomarker. Conversely, the technobiology approach that exploits advanced engineering to control underlying molecular mechanisms to recover biosystem's energy states at the molecular level as well as at the level of the entire network of cells (i.e., the internet of the human body) is still in its early research stage. The recently developed magnetoelectric nanoparticles (MENPs) provide a tool to enable the unique capabilities of technobiology. Using exemplary studies that could potentially lead to future pinpoint treatment and prevention of cancer, neurodegenerative diseases, and HIV, this article discusses how MENPs could become a vital enabling tool of technobiology.

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Status and Perspectives of Multiferroic Magnetoelectric Composite Materials and Applications

Cited by 406 publications

References 143 publications

Investigation of magnetoelectric effect in lead free K0.5Na0.5NbO3-BaFe12O19 novel composite system

Investigation of magnetoelectric effect in lead free K0.5Na0.5NbO3-BaFe12O19 novel composite system

Low‐Loss Piezoelectric Single‐Crystal Fibers for Enhanced Magnetic Energy Harvesting with Magnetoelectric Composite

Technobiology’s Enabler: The Magnetoelectric Nanoparticle

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