Magneto-electric properties of xNi0.7Zn0.3Fe2O4 – (1-x)BaTiO3 multiferroic composites

Dzunuzovic, A.; Petrović, M.M. Vijatović; Bobić, J.D.; Ilić, Nikola; Ivanov, M. V.; Grigalaitis, R.; Banys, J.; Stojanović, B. D.

doi:10.1016/j.ceramint.2017.09.229

Cited by 47 publications

(19 citation statements)

References 39 publications

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“…This magnetic structure is derived from the unbalanced antiparallel spins between Fe 3+ ions at tetrahedral sites and Ni 2+ ions at octahedral sites [3]. As it was noticed by other authors, the addition of Cu 2+ ions lead to the decrease of saturation magnetization in comparison with the pure NZF ceramics [7,25]. On the other hand, Sm was added in order to obtain lower values of H c , but it was not successful in the present case.…”

Section: Magnetic Propertiesmentioning

confidence: 45%

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Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity

Vijatovic-Petrovic

Dzunuzovic

Bobić

et al. 2020

PAC

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Composites based on barium titanate and nickel zinc ferrite doped with cooper and samarium were prepared by a mixing method. The formation of barium titanate tetragonal crystal structure and nickel zinc ferrite cubic spinel structure was identified. Polygonal grains were formed in all three types of ceramics. Due to the very high conductivity of ferrite phase in the materials the ferroelectric hysteresis loops were roundish and not typical for classical ferroelectric material. The break down field was found to be similar for all compositions. Leakage current measurements have shown the existence of different types of conductivity mechanisms in each material. The impedance analysis suggested a bit stronger impact of grain boundaries on total conductivity of the composites and the mechanism of polaronic conduction of two types. The magnetization of the composites is lower than for the pure ferrite phase and corresponds to the weight fraction of the ferrite phase. The soft magnetic nature of these composites might be very useful for development of multifunctional devices which will be able to switch the magnetization with small external magnetic field. Humidity sensing properties of the prepared ceramics were also investigated.

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Section: Magnetic Propertiesmentioning

confidence: 45%

“…The activation energy necessary for electron hopping conduction, found in the literature, is very low, ∼0.2 eV [25][26][27]. Usually, it is less than 0.2 eV for n-type polaronic conduction and above 0.2 eV for polaronic conduction of the holes.…”

Section: Impedance Analysismentioning

confidence: 99%

Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity

Vijatovic-Petrovic

Dzunuzovic

Bobić

et al. 2020

PAC

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“…The investigation of the magnetic properties of nickel zinc ferrite [20], showed that the optimal molar ratio between nickel and zinc, for the achievement of good magnetic properties, was 70/30. Thus, in our previous paper [21] the NZF with molar ratio Ni/Zn = 0.70/0.30 was used for the production of the multiferroic composite materials with ferroelectric phases, BT and PZT.…”

Section: Methods and Characterization Of Ceramicsmentioning

confidence: 99%

“…The resulting solution of titanium ortho-nitrate (TiO(NO 3 ) 2 ) was mixed with the solution of barium nitrate and citric acid. The temperature of 300°C in the electrical calotte induced a self-propagation reaction and the obtained barium titanate precursor was further thermally treated at 900°C for 2 h [21]. Starting reagents used for PZT synthesis were: lead nitrate (Pb(NO 3 ) 2 ), zirconium (IV) oxynitrate hydrate (ZrO(NO 3 ) 2 · H 2 O), titanium isopropoxide Ti(OCH(CH 3 ) 2 ) 4 , C 6 H 8 O 7 · H 2 O and NH 4 OH.…”

Section: Synthesis Of Ferroelectric and Ferrite Phasesmentioning

confidence: 99%

Magneto-dielectric properties of ferrites and ferrite/ferroelectric multiferroic composites

Dzunuzovic

Vijatovic-Petrovic

Ilić

et al. 2019

PAC

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Ni-Zn ferrites, with the general formula Ni 1-x Zn x Fe 2 O 4 (x = 0.0, 0.3, 0.5, 0.7, 1.0), CoFe 2 O 4 , BaTiO 3 and PbZr 0.52 Ti 0.48 O 3 powders were synthesized by auto-combustion method. The composites were prepared by mixing the appropriate amounts of individual phases, pressing and conventional sintering. X-ray analysis, for individual phase and composites, indicated the formation of crystallized structure of NiZnFe 2 O 4 , BaTiO 3 and PbZr 0.52 Ti 0.48 O 3 without the presence of secondary phases or any impurities. SEM analyses indicated a formation of uniform grain distribution for ferromagnetic and ferroelectric phases and formation of two types of grains, polygonal and rounded, respectively. Magneto-dielectric effect was exhibited in all samples because of the applied stress occurring due to the piezomagnetic effect and the magnetic field induced the variation of the dielectric constant. For all samples the dielectric constant was higher in applied magnetic field. At the low frequency, the dispersion of dielectric losses appeared, while at the higher frequency the value of tan δ become constant (Maxwell-Wagner relaxation). Investigation of J-E relation between leakage and electric field revealed that both nickel zinc ferrite and composites have three different regions of conduction: region with ohmic conduction mechanism, region with the trap-controlled space charge limited current mechanism and region with space charge limited current mechanism.

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“…Generally, the selection of ferromagnetic/ferrimagnetic and ferroelectric materials depends on some factors, such as high magnetostrictive coefficient, high resistivity of both phases, high dielectric permittivity and high piezoelectric effect. In this context, barium titanite (BaTiO 3 ) is considered as one of the most widely used ferroelectric material for multiferroic composites [4][5][6][7]. On the other hand, the origin of ferroelectricity in SrTiO 3 is due to the defect engineering, which can induce the ferroelectricity in SrTiO 3 during the growth process of nanoparticles in a host matrix.…”

Section: Introductionmentioning

confidence: 99%

Physical, magnetic and enhanced electrical properties of SrTiO3–MgFe2O4 nanocomposites

et al. 2020

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Multiferroic of strontium titanate and magnesium ferrite nanocomposites with chemical formula x SrTiO 3 + (1 − x) MgFe 2 O 4 ; x = 0, 0.6, 0.7, 0.8, 0.9 and 1.0 have been synthesized through sol gel auto-combustion pathway. The blending is based on ball milling method. The lattice parameters and crystallite size of the combination nanocomposites were constant with different ratios of SrTiO 3. FE-SEM revealed that the grain size decreased with x. The magnetization M s was carried out using vibrating sample magnetometer at room temperature while the relative permeability µ r was studied as a function of temperature at a constant frequency. Both saturation magnetization and relative permeability decreased with various increments of SrTiO 3. DC electrical resistivity and (P-E) loops measurements were investigated. The dielectric properties and DC resistivity were enhanced. Such promising results are prospective requests for sensors, high frequency applications and stage memories.

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Magneto-electric properties of xNi0.7Zn0.3Fe2O4 – (1-x)BaTiO3 multiferroic composites

Cited by 47 publications

References 39 publications

Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity

Study of barium titanate/nickel-zinc ferrite based composites: Electrical and magnetic properties and humidity sensitivity

Magneto-dielectric properties of ferrites and ferrite/ferroelectric multiferroic composites

Physical, magnetic and enhanced electrical properties of SrTiO3–MgFe2O4 nanocomposites

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