Magnetodielectric effect in lead-free multiferroic CoFe2O4/K0.5Na0.5NbO3 bilayers

He, Song; Liu, Guolei; Xu, Jun; Yang, J. J.; Chen, Yanxue; Kang, Shishou; Shen, Yan; Mei, Liangmo

doi:10.1016/j.matlet.2012.08.096

Cited by 24 publications

(4 citation statements)

References 20 publications

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“…This indicates the presence of negative coupling in the composites [44]. It can be seen that the values of MD increase from x = 0.1 to 0.4 and reaches a maximum of ~ −10% for x = 0.4, which is relatively higher comparing to recently reported KNNbased multiferroic composites, indicating strong ME coupling effect [15,19,29,45]. The magnetodielectric response of composite sample for x = 0.4 at certain frequencies individually shown in Figure 8(b).…”

Section: Magnetodielectric Propertiesmentioning

confidence: 56%

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Multiferroic and magnetodielectric properties of (1-x)KNN-xCMgFO ceramic-based composites

Kaur

Singh

et al. 2020

Journal of Asian Ceramic Societies

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The multiferroic composite ceramics of (1-x)[K 0.5 Na 0.5 NbO 3 ]-x[Co(Mg 0.05 Fe 1.95 )O 4 ]; x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5 and 1.0 have been synthesized by solid-state route. The effect of stoichiometric proportions on their structural, morphological, ferroelectric, dielectric, magnetic and magnetodielectric properties has been explored in detail. The dual phase formation in the XRD pattern has revealed the presence of orthorhombic and spinel cubic structures of KNN and CMgFO, respectively. SEM investigations indicated the cuboidal shaped grains of KNN, while agglomeration has been observed for CMgFO. All the composites have found to exhibit ferromagnetic ordering, where M s continuously increases with increasing CMgFO concentration (~9 to 41 emu/g for x = 0.1 to x = 0.5); however, ferroelectric nature of composites decreases with increasing CMgFO concentration. The dielectric constant decreases, while loss increases with increasing ferrite concentration, except for x = 0.5. The decrease in dielectric constant with magnetic field is an evidence of magnetodielectric (MD) effect, with MD values of −3.5%, −3.6%, −4.5%, −10.3% and −5.2% for x = 0.1, 0.2, 0.3, 0.4 and 0.5, respectively. The maximum value of MD ~ −10% for x = 0.4 composite, indicated the appreciable ME coupling effect between ferroelectric and ferromagnetic phases, in present research work.

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Section: Magnetodielectric Propertiesmentioning

confidence: 56%

“…Henceforth, world-wide R&D on lead-free piezoelectric materials are gaining much more attention. In the search for finding these lead-free constituents, many systems have been studied like BaTiO 3 [12][13][14][15][16][17][18][19][20] etc.…”

Section: Introductionmentioning

confidence: 99%

Multiferroic and magnetodielectric properties of (1-x)KNN-xCMgFO ceramic-based composites

Kaur

Singh

et al. 2020

Journal of Asian Ceramic Societies

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“…Thus, one of the most important issues in this field is how to achieve a large MDE near room temperature [8,9], being composite systems composed by dielectric and magnetic materials [10,11] the most promising approaches. There are two major mechanisms leading to a large MDE in multiferroic composites: one is the combination of the magnetoresistance (MR) and Maxwell-Wagner effects [12], which is not related to intrinsic magnetodielectric coupling; and the other is the magnetic-field-induced strain-mediated effect through interface coupling [7,13]. For the first case, the selection of possible materials for the MR-related MDE is significantly broad and, as an example, it has been achieved a room temperature MDE effect of 0.8% under 7 T in core-shell BaTiO3-c-Fe2O3 nanoparticles [14].…”

Section: Introductionmentioning

confidence: 99%

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Martins

Silva

et al. 2016

Applied Physics Letters

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The dielectric constant, dielectric loss and saturation magnetization of the polymer composite films increase with increasing CoFe2O4 (CFO) content, being 13, 0.13 and 13 emu.g-1 respectively, for x=20. The magnetodielectric (MD) coupling also depend on the CFO content, the change in the dielectric response (MDE(%)) being the highest for the x=20 sample (4.2%). On the other hand, the highest value of the MD coefficient (γ) is higher on the x=3 sample (0.015 emu-2 g 2). Those values are favourably compared with the ones found in the ceramicbased MD materials, being the highest reported for polymer composites. 2 These facts, together with the flexibility and scalable production of the composites, leads to their large application potential in areas such as filters, magnetic field sensors and actuators, among others.

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“…Materials with magnetocapacitance effect are promising for advanced applications in magnetic field sensors, data storage, and microwave communication devices [1][2][3]. Currently, main attention has been paid to the magnetocapacitance composites with magnetoelectric coupling, which consist of piezoelectric phase and piezomagnetic or magnetostrictive phase, such as CFMO-PBT, CFO-KNN, and Terfenol-D-PZT [4][5][6][7][8][9]. Recently, magnetocapacitance nanocomposites without magnetoelectric coupling composed of magnetic nanoparticles and polymer have also been reported [10,11].…”

Section: Introductionmentioning

confidence: 99%

Clarification of the Magnetocapacitance Mechanism for Fe₃O₄‐PDMS Nanocomposites

Chen

Yang²,

Zhang

et al. 2015

Journal of Nanomaterials

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We mainly focused on the magnetocapacitance effect of Fe 3 O 4 -PDMS nanocomposites. We also proposed the preparation method and measured microstructures, magnetic properties, and magnetocapacitance value of the nanocomposites. The magnetocapacitance measurement results show that the nanocomposites have magnetocapacitance property, the magnetocapacitance with magnetic field depends on the magnetic property, and the value at the same magnetic field is increasing with the volume fraction of Fe 3 O 4 nanoparticles. The magnetocapacitance model is proposed to explain this phenomenon by analyzing the magnetic interaction between particles and the viscoelasticity of PDMS. We also calculated the theoretical capacitance value of all samples using the magnetization of nanoparticles and mechanical parameters of PDMS. From the theoretical values, it is concluded that the model we proposed can well explain the magnetocapacitance effect of Fe 3 O 4 -PDMS nanocomposites.

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Magnetodielectric effect in lead-free multiferroic CoFe2O4/K0.5Na0.5NbO3 bilayers

Cited by 24 publications

References 20 publications

Multiferroic and magnetodielectric properties of (1-x)KNN-xCMgFO ceramic-based composites

Multiferroic and magnetodielectric properties of (1-x)KNN-xCMgFO ceramic-based composites

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Clarification of the Magnetocapacitance Mechanism for Fe₃O₄‐PDMS Nanocomposites

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Magnetodielectric effect in lead-free multiferroic CoFe2O4/K0.5Na0.5NbO3 bilayers

Cited by 24 publications

References 20 publications

Multiferroic and magnetodielectric properties of (1-x)KNN-xCMgFO ceramic-based composites

Multiferroic and magnetodielectric properties of (1-x)KNN-xCMgFO ceramic-based composites

Improved magnetodielectric coefficient on polymer based composites through enhanced indirect magnetoelectric coupling

Clarification of the Magnetocapacitance Mechanism for Fe3O4‐PDMS Nanocomposites

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Clarification of the Magnetocapacitance Mechanism for Fe₃O₄‐PDMS Nanocomposites