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Substitution of barium atoms with strontium activates ferromagnetic exchange type. • Iron clustering degree was found to be reduced by strontium in the …
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Magnetic recording media requires good particle dispersion, a smooth surface, and small interparticle interaction to make an adequate signal-to-noise ratio (SNR). Well dispersed 50-60 nm sized spherical barium-strontium ferrite (S-Ba/Sr-Fe) nanoparticles were successfully prepared with 40 nm sized hematite precursor particles …
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A comprehensive study at the DFT + U level of the magnetic properties of the strontium hexaferrite (SFO) has been performed, providing estimates of the Fe …
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The influence of the microstructure of Ba 0.6 Sr 0.4 TiO 3 (BST) bulk ceramics and thick films on the dielectric properties have been studied. Thick films have been prepared by screen technique on Al 2 O 3 substrates. The powder has been prepared by using the common mixed oxide technique. In comparison to dense bulk …
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The self-propagating high-temperature synthesis and sintering of Ba, Sr, and Pb ferrites are studied. The combustion temperature is shown to influence the defect density and internal stress in the resultant ferrite powders. The structure and properties of the ferrites are sensitive to both the combustion and sintering temperatures.
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Co4+-Ca2+ substituted M-type barium strontium hexagonal ferrites with chemical composition Ba0.25Sr0.75CoxCaxFe12-2xO19 (x = 0.0, 0.2, 0.4, 0.8, 1.2, 1.6 and 2.0) were prepared by sol-gel auto ...
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1.. IntroductionPhased array antennas with steerable electronic beam will gain increasing importance in future applications in radar, satellite and communication systems. 1 The use of ferroelectric ceramics, like barium strontium titanate (BST), for phase shifters could be a cheap alternative to the commonly used components in such applications. 2, …
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Barium hexaferrites, known as hard magnetic materials, are characterized by high magnetization, curie temperature, cost-effectiveness, susceptibility to degradation, …
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Request PDF | Raman spectroscopy study, magnetic and microwave absorbing properties of modified barium strontium monoferrite Ba(1-x)Sr(x)Fe2O4 | In the contrary to other common AFe2O4 (A = Mn, Fe ...
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In the literature, the Schottky emission equation is widely used to describe the conduction mechanism in perovskite-type titanate thin films. Though the equation provides a good fit to the leakage current data, the extracted values of the Richardson and dielectric constants are inconsistent with their experimental values.
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What is the formula for Barium Chloride? Answer. Barium is an alkaline earth and always corms a cation of charge of [+2], while chlorine is a halogen and always form the chloride ion of [-1]. For barium chloride to be neutral you would need two chlorides for every barium, and so the formula is BaCl 2.
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M-type strontium and barium hexaferrites are useful permanent magnetic materials, microwave devices, and magnetic recording media due to their high saturation magnetization, high coercivity, and perfect chemical stability and low production cost [1, 2].Crystal structure of M-type hexaferrites consists of R and S blocks.
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The structural, magnetic, and electronic properties of iron doped barium strontium titanate (Ba 0.7 Sr 0.3 Fe x Ti 1−x O 3 where x = 0, 0.1, 0.2, 0.3; BSTF) solid …
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Tunable X-band and Ku-band combline bandpass filters using barium-strontium-titanate capacitors fabricated on alumina substrates with through-substrate CuW vias are reported. Under a 0-100 V bias, the X-band filter changes center frequency from 8.75 GHz to 10.96 GHz with 4-8 dB of loss while the Ku-band filter changes center …
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Strontium and barium have reactivities similar to that of lithium. Calcium, for example, reacts fairly vigorously and exothermically with cold water. Bubbles of hydrogen gas are given off, and a white precipitate (of calcium hydroxide) is formed, together with an alkaline solution (also of calcium hydroxide, which is slightly water-soluble). ...
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Sharma et al., 2022 synthesized Ba 1-0.5x Cu 0.5x Fe 12 O 19 (where x = 0.00–0.3) hexaferrites using a sol–gel process. VSM was taken into account to study the magnetic traits of synthesized hexaferrites. Magnetic characteristics of barium nano hexaferrites were investigated at room temperature, and based on these findings, M s …
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Pr–Bi co-doped M-type Ba–Sr hexaferrites with nominal compositions Ba0.35Sr0.65−xPrxFe12.0−xBixO19 (0.00 ≤ x ≤ 0.40) were synthesized for the first time by the solid-state reaction method.
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LiZrZn ferrite materials (Li0.47Zr0.11Zn0.27Fe2.15O4) were synthesized at 900 °C with different contents of LBBS (Li2O-B2O3-Bi2O3-SiO2) glass.
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The NLME tensor coefficients were determined form the estimated changes in the magnetization and uniaxial anisotropy field. ... first observed in M-type strontium (Sr) and barium ... and the data ...
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We assessed the spatial distribution of 35 elements in aquifer sediments and groundwater of a crude-oil-contaminated aquifer and show evidence of the dissolution of barium (Ba), strontium (Sr), cobalt (Co), and nickel …
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Highlights Multiferroic Co-doped barium strontium titanate nanofibers were synthesized. The nanofibers were well-distributed with highly crystalline structure. The nanofibers showed a relatively tight structure after the annealing process. The success of Co doping was confirmed by XPS and EDS analysis. The ferromagnetic behavior was …
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A tunable third-order combline bandpass filter using thin-film barium-strontium-titanate varactors and fabricated on a sapphire substrate is reported. Application of 0-200-V bias varied the center frequency of the filter from 2.44 to 2.88 GHz (16% tuning) while achieving a 1-dB bandwidth of 400 MHz. The insertion loss varied from 5.1 dB at zero bias to 3.3 …
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Barium/strontium cobaltite/ferrite (BSCF) Ba(0.5)Sr(0.5)Co(0.8)Fe(0.2)O(3-delta) was recently identified as a promising candidate for cathode material in intermediate temperature SOFCs. In this work, we perform experimental and theoretical study of the local atomic structure of BSFC. Micro-Raman spectroscopy was performed to characterize the ...
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S11 vs. f data for BaFe12O19 (a) and SrFe12O19 (b) in the multidomain state for a series of applied electric current values. Samples dimensions are 1.90×1.95×0.20 and 2.05×2.15×0.16 mm 3 ...
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2.2 Synthesis of M-Type Hexaferrite. M-type ferrite was synthesized by a solid-phase reaction. Put the weighed raw materials according to the chemical formula Ba 0.85 Pr 0.15 Fe 12-x Al x O 19 (x …
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Abstract. In this paper, the ambient temperature multiferroic effect resulting from the incorporation of transition metal ions (Fe3+ and Co2+) in lead-free BST [Ba0.7Sr0.3 …
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How do you find the formula of an ionic compound from its name or vice versa? Watch this worked example video to learn how to apply the rules of naming and writing ionic formulas. Khan Academy offers free, world-class education for anyone, anywhere.
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Barium Strontium Titanate thin film was fabricated successfully on a corning glass substrate via sol-gel process technique. The as-prepared film was found to be amorphous, which crystallizes after annealing at different temperatures (500 °C, 550 °C). The influence of annealing temperature on the structural and optical properties of the ...
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The nonlinear effective dielectric properties of barium strontium titanate (BST) composites at microwave frequencies are important for designing microwave phase shifters, tunable capacitors, and nonlinear transmission lines (NLTLs) for high-power microwave applications. Previous studies have reported the dielectric properties of these …
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We investigated the tunability of the dielectric characterization of the Ferroelectric Barium Strontium Titanate (Ba 0.5 Sr 0.5 TiO 3) thin film on the Strontium Titanate substrate by a dc bias electric field through the terahertz time-domain spectroscopy.The tunability of the real part of the permittivity reached up to 74.8% and …
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