نتایج جستجو برای: type hexaferrite
تعداد نتایج: 1342251 فیلتر نتایج به سال:
In this research, barium calcium hexaferrite (Ba1-xCaxFe12O19 , 0≤x£1) nanoparticles were synthesized through a sol-gel combustion method. The dried gel samples were then calcined at 950ᵒC for 4:30h. The phase and microstructural evolution of calcined samples were investigated by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM), respectively. The results revealed formation ...
Samples of BaFe12O19 M-type barium hexaferrite with partial iron substitution by zirconium ions (concentration up to 10 at.%) have been synthesized and investigated. Studies crystal features, phase composition, magnetic properties were carried out using X-ray diffraction, Mössbauer spectroscopy, VSM respectively. The presence limited heterovalent isomorphism the 2Fe3+ → Zr4+ + Fe2+ mechanism wa...
• Lightweight and thin MXene/doped-hexaferrite composite that can suppress electromagnetic interference is reported. This suppresses waves dominantly via absorption over the frequency range from 30 to 50 GHz. The 1.5 mm thick MXene/45 wt% doped-hexaferrite shows a broad effective bandwidth of 7 developed MXene/BaCo0.3Ti0.3Fe11.4O19 hexaferrite be promising EM wave absorber material for millimet...
We find the realization of large converse magnetoelectric (ME) effects at room temperature in a magnetoelectric hexaferrite Ba0.52Sr2.48Co2Fe24O41 single crystal, in which rapid change of electric polarization in low magnetic fields (about 5 mT) is coined to a large ME susceptibility of 3200 ps/m. The modulation of magnetization then reaches up to 0.62μ(B)/f.u. in an electric field of 1.14 MV/m...
The dielectric properties of Z-type hexaferrite Sr3Co2Fe24O41 (SCFO) have been investigated as a function of temperature from 153 to 503 K between 1 and 2 GHz. The dielectric responses of SCFO are found to be frequency dependent and thermally activated. The relaxation-type dielectric behavior is observed to be dominating in the low frequency region and resonance-type dielectric behavior is foun...
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The microtexture of differently prepared Ba-hexaferrite samples is investigated by means of electron backscatter diffraction (EBSD). Kikuchi patterns are obtained with a high image quality, enabling a spatial resolution of the EBSD maps of about 20 nm. The spatially highly resolved EBSD mappings provide additional information (individual grain orientation, misorientation angles, grain size dist...
Magnetic spiral structures can exhibit ferroelectric moments as recently demonstrated in various multiferroic materials. In such case the helicity of the magnetic spiral is directly correlated with the direction of the ferroelectric moment and measurement of the helicity of magnetic structures is of current interest. We used soft x-ray resonant diffraction with circular polarized incident radia...
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