Magnetoelectric coupling enhancement in lead-free BCTZ–xNZFO composites

Bansal, Pankhuri; Kumar, Manoj; Syal, Rajat; Singh, Arun K.; Kumar, Sanjeev

doi:10.1007/s10854-021-06284-9

Cited by 17 publications

(5 citation statements)

References 51 publications

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“…In the case of the 70BP-F sample, an increase in temperature (above room temperature) results in a decrease in dielectric loss factor (to approx. 80 °C), and a further increase in temperature does not cause such a significant increase in tanδ values as in the case of the other two 50BP-F and 70BP-F compositions (Figures 6b,d In the case of composite materials, the deterioration of ferroelectric properties is also quite common [48]. Using two ferroelectric materials in a composite composition (one of which has high ferroelectric parameters) may be one of the effective ways to maintain high ferroelectric properties in multiferroic composites with a predominant amount of the ferroelectric phase, also when using classical free sintering [29].…”

Section: Resultsmentioning

confidence: 82%

“…Figure 7 a shows the results of dielectric tests of three composite compositions at 1 kHz. As commonly known, introducing ferrite into composite composition increases the dielectric loss factor values and electrical conductivity [ 48 ]. However, in the case of the analyzed compositions, this increase is smaller than in the case of composite materials with cobalt ferrite [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

“…Reducing the percentage of BaTiO3 in the ferroelectric composite matrix of the composite material reduces the ferroelectric properties, i.e., Pr and Ps values (Table 2, Figure 7b). In the case of composite materials, the deterioration of ferroelectric properties is also quite common [48]. Using two ferroelectric materials in a composite composition (one of which has high ferroelectric parameters) may be one of the effective ways to maintain high ferroelectric properties in multiferroic composites with a predominant amount of the ferroelectric phase, also when using classical free sintering [29].…”

Section: Resultsmentioning

confidence: 99%

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Electrophysical Properties of the Three-Component Multiferroic Ceramic Composites

Bochenek,

Niemiec,

Brzezińska

et al. 2023

Materials

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Using the free (pressureless) sintering method, multiferroic ceramic composites based on two ferroelectric materials, i.e., BaTiO3 (B) and Pb0.94Sr0.06 (Zr0.46Ti0.54)0.99Cr0.01O3 (P), and magnetic material, i.e., zinc–nickel ferrite (F) were obtained. Three composite compositions (BP-F) were obtained with a constant 90/10 content (ferroelectric/magnetic) and a variable content of the ferroelectric component (B/P), i.e., 70/30, 50/50, and 30/70. Crystalline structure, microstructural, DC electrical conductivity, dielectric, and ferroelectric properties of multiferroic composites were investigated. The concept of a composite consisting of two ferroelectric components ensures the preservation of sufficiently high ferroelectric properties of multiferroic composites sintered by the free sintering method. Research has shown that the percentage of individual ferroelectric components in the composite significantly affects the functional properties and the entire set of physical parameters of the multiferroic BP-F composite. In the case of the dielectric parameters, the best results were obtained for the composition with a more significant amount of BaTiO3; i.e., permittivity is 1265, spontaneous polarization is 7.90 µC/cm2, and remnant polarization is 5.40 µC/cm2. However, the most advantageous set of performance parameters shows the composite composition of 50BP-F.

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Electrophysical Properties of the Three-Component Multiferroic Ceramic Composites

Bochenek,

Niemiec,

Brzezińska

et al. 2023

Materials

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“…High electrical conductivity causes a problem during the poling process, making it difficult to obtain high piezoelectric properties. On the other hand, previous studies on the functional properties and magnetoelectric coupling of multiferroic composites have shown that a more significant amount of the magnetic phase in the composition of the multiferroic composite allows for obtaining a higher magnetoelectric effect, e.g., [45,46]. In order to obtain high magnetoelectric coupling in multiferroic ferrite composites, many factors must be met, among others, namely high piezoelectric properties (ferroelectric phase) and high values of the magnetostriction coefficient (ferro/ferrimagnetic phase), and both phases must be in equilibrium, the mechanical contact between ferroelectric and ferro/ferrimagnetic grains must be perfect, etc.…”

Section: Introductionmentioning

confidence: 99%

Magnetoelectric Properties of Multiferroic Composites Based on BaTiO3 and Nickel-Zinc Ferrite Material

Bochenek,

Niemiec,

Brzezińska

et al. 2024

Materials

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The purpose of the present study was to learn the morphological, structural, ferroelectric, dielectric, electromechanical, magnetoelectric, and magnetic properties, and DC conductivity of BaTiO3-Ni0.64Zn0.36Fe2O4 (BT-F) multiferroic composites compacted via the free sintering method. The influence of the ferrite content in ceramic composite materials on the functional properties is investigated and discussed. X-ray diffraction studies confirmed the presence of two main phases of the composite, with strong reflections originating from BaTiO3 and weak peaks originating from nickel-zinc ferrite. BT-F ceramic composites have been shown to exhibit multiferroism at room temperature. All studied compositions have high permittivity values and low dielectric loss, while the ferroelectric properties of the BT component are maintained at a high level. On the other hand, magnetic properties depend on the amount of the ferrite phase and are the strongest for the composition with 15 wt.% of F (magnetization at RT is 4.12 emu/g). The magnetoelectric coupling between BT and F phases confirmed by the lock-in technique is the largest for 15 wt.% ferrite. In the present work, the process conditions of the free sintering method for obtaining BT-F multiferroic composite with good electrical and magnetic properties (in one material) were optimized. An improved set of multifunctional properties allows the expansion of the possibilities of using multiferroic composites in microelectronics.

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“…Lead-free Barium Calcium Zirconate Titanate (BCZT) is one of the most promising candidates that has drawn attention since the past decade due to its good performance of electrical properties. BCZT is a Barium Titanate (BT) based ceramic with Calcium (Ca) ion and Zirconium ion (Zr) substitution at the A-site and B-site, respectively [14]. This material exhibits a high piezoelectric coefficient (d33 ~ 300 -650 pC/N) due to the shifting of the orthorhombic-tetragonal (TO-T) temperature towards ambient temperature that is called the polymorphic phase transition (PPT) [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Comparison between Lithium Substitution and Doping on the Physical and Piezoelectric Properties of Lead-Free BCZT Ceramics

Haziqah Fadhlina Md Hussain,

Atiqah Mohd Afdzaluddin,

Zalita Zainuddin

et al. 2023

ARAM

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Defects generation in ceramics by element substitution or doping may improve their properties. However, different results will be obtained even though the same element is involved due to different mechanisms. Ceramics Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCZT) is one of the potential candidates to replace lead-based material PZT. However, the conventional method requires high-temperature calcination and sintering process to synthesize this material. Thus, Lithium (Li) can act as the sintering aid to lower the temperature at the same time, the properties of piezoelectric can be enhanced. In this paper, the structural, physical, and piezoelectric performance of lead-free Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCZT) ceramics with Lithium Li substitution and doping, synthesized by the solid-state reaction method were studied. The substitution of Li increases the density, ρ and piezoelectric coefficient, d33 of BCZT which are 4.075 g/cm3 and 304.6 pC/N, respectively. These results demonstrate that Li substitution is more beneficial to the piezoelectric properties than doping because it produces higher grain boundary resistance and activation energy and has lower conductivity than doping. This can provide a definite strategy during the chemical composition design and manufacture of BCZT ceramics.

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Magnetoelectric coupling enhancement in lead-free BCTZ–xNZFO composites

Cited by 17 publications

References 51 publications

Electrophysical Properties of the Three-Component Multiferroic Ceramic Composites

Electrophysical Properties of the Three-Component Multiferroic Ceramic Composites

Magnetoelectric Properties of Multiferroic Composites Based on BaTiO3 and Nickel-Zinc Ferrite Material

Comparison between Lithium Substitution and Doping on the Physical and Piezoelectric Properties of Lead-Free BCZT Ceramics

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