Applicability of effective medium theory to ferroelectric/ferrimagnetic composites with composition and frequency-dependent complex permittivities and permeabilities

Mantese, J. V.; Micheli, Adolph L.; Dungan, D. F.; Geyer, Richard G.; Baker–Jarvis, James R.; Grosvenor, John H.

doi:10.1063/1.361010

Cited by 125 publications

(62 citation statements)

References 28 publications

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“…Linear-fit operation for the data of the sample with f=0.09 gives u=0.86, which is lower than the normal value from the percolation theory. This discrepancy has also been observed in other works [11]. The percolation theory can describe the singular change in the conductivity near the percolation threshold exactly only when the difference between the conductivity of the matrix and that of the filler is very large.…”

Section: Resultsmentioning

confidence: 53%

“…This requires the multi-function component to work both as capacitance and inductance. Much work has been done to synthesize ferrite-ferroelectric ceramic composite materials to meet the requirements for multi-function component [11][12][13][14]. However, the ferrite phase and ferroelectric phase must be co-fired and sintered at high temperature.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic and dielectric properties of a double-percolating Ni0.3Zn0.7Fe1.95O4-Ni-polymer composite

Shen

Yue

et al. 2007

J Electroceram

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A novel three-phase, double-percolating composite with a ferromagnetic phase (NiZn ferrite) and metallic inclusion (nickel) embedded in the polyvinylidene fluoride matrix is prepared by a simple hot-molding method. The large ferrite particles in the composite not only act as magnetic phase, endowing the composite with high initial permeability, but also present as a high-volume fraction discrete (nonpercolating) phase, confining polymer and metallic particles into a continuous double-percolating structure of low volume fractions. The increase in the content of the magnetic nickel particles compensates the decrease in the content of the NiZn ferrite, hence a stable initial permeability with an enhanced dielectric constant has been observed. The dielectric losses of the composites were reduced compared with the previous works.

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Section: Resultsmentioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Magnetic and dielectric properties of a double-percolating Ni0.3Zn0.7Fe1.95O4-Ni-polymer composite

Shen

Yue

et al. 2007

J Electroceram

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“…[9][10][11][12][13][14] Fievet et al studied the dynamic magnetic properties of CoNi and FeCoNi nanoparticles embedded in MnO 2 in the 0.1-18 GHz range. 9,10 Monodispersed nanoparticles with tailored compositions were prepared by the polyol process, and exchange resonance modes were observed on the composites made from these synthesized nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Nanocomposite for Potential Ultrahigh Frequency Microelectronic Application

Dong

Meininger

Jiang

et al. 2007

Journal of Elec Materi

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Cobalt ferrite nanocomposites were investigated as example materials for microelectronic applications in the ultrahigh frequency range. Both static magnetic properties (magnetization versus applied field curve) and dynamic properties (complex permeability and permittivity at frequencies up to 1 GHz) were studied. When the ferritic density reached a certain level, the coercivity of the composite material decreased and the permeability increased noticeably. This phenomenon indicated the establishment of magnetic coupling between particles, which is necessary for magnetic nanocomposites to be used in electronic applications. Compared to magnetic composites made of micronsized fillers, the magnetic loss of the nanocomposites was lower. However, the permeability of the nanocomposite was also lower. Cobalt zinc ferrite nanocomposites were prepared to explore the effect of composition, which revealed that the permeability of the magnetic nanocomposite could be improved by modifying the composition.

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“…The dielectric-magnetic composites have recently received much more attention. A lot of work has been carried out on synthesizing dielectricmagnetic composite materials to meet the requirement for multifunctional components [5][6][7][8][9]. These composite materials show both inductive and capacitive properties, which have been regarded to be an effective solution to fabricate miniature filters and antenna, electro-magnetic interference (EMI) devices and so on.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional SrTiO3/NiZn ferrite/POE composites with eletromagnetic and flexible properties for RF applications

et al. 2007

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Multifunctional dielectric composites with electromagnetic and flexible properties for RF applications were investigated. A kind of low loss flexible dielectric and magnetic composite with SrTiO 3 (STO) ultrafine particles and NiZn ferrite (NZO) ultrafine particles embedded in a Thermoplastic Polyolefin Elastomer (POE) matrix was fabricated using the extrusion technology. The dielectric and magnetic properties of the as-prepared composites with different volume fraction of ceramic fillers were studied. The results indicate that when the volume of the ceramic fillers is fixed, the permittivity of the composites increase while the dielectric loss, permeability and magnetic loss decrease with the increasing of the ratio of STO to NZO. The cut-off frequencies of the composites are all above 1 GHz. The good frequency stability of the electromagnetic properties within a wide frequency range was observed. All the composites show very good flexibilities. With the increasing of the volume fraction of ceramic fillers, the tensile strength and elongation decrease. The obtained multifunctional flexible magnetic-dielectric composites are good candidates for the applications of the capacitorinductor integrating devices in RF communications such as electromagnetic interference filters and antennas.

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Applicability of effective medium theory to ferroelectric/ferrimagnetic composites with composition and frequency-dependent complex permittivities and permeabilities

Cited by 125 publications

References 28 publications

Magnetic and dielectric properties of a double-percolating Ni0.3Zn0.7Fe1.95O4-Ni-polymer composite

Magnetic and dielectric properties of a double-percolating Ni0.3Zn0.7Fe1.95O4-Ni-polymer composite

Magnetic Nanocomposite for Potential Ultrahigh Frequency Microelectronic Application

Multifunctional SrTiO3/NiZn ferrite/POE composites with eletromagnetic and flexible properties for RF applications

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