CHF3/SF6 gas mixtures Zhaohui Chen, Aria Yang, Changqing Xie, Qinghua Yang, C. Vittoria, and V. G. Harris Center for Microwave Magnetic Materials and Integrated Circuits and Department of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts 02115 USA Key Laboratory of Nano-Fabrication and Novel Devices Integrated Technology, Institute of Microelectronics, Chinese ...

Abstract The purpose of this study was to evaluate the electromagnetic (EM) properties hybrid materials made from polypyrrole (PPy) and barium hexaferrite (HF) for possible use in interference (EMI) shielding applications. X-ray diffraction Fourier-transform infrared spectroscopy methods were used confirm presence PPy HF phases inside structure. A scanning electron microscope analysis revealed ...

• Terahertz-infrared electrodynamic response for Ba 0.2 Pb 0.8 Al 1-x Fe 12-x O 19 crystals (x=0.0, 1.2, 3.0, 3.3) is studied in detail. A set of THz excitations are observed and assigned to the transitions from A1-term fine structured ground state 2+ . For all 3+ concentrations, ions mainly occupy octahedral site positions. Concentration dependence Fe-O bond length established. The lowest A2u ...

The microscopic mechanism of the occurrence ferroelectric properties in M-type barium hexaferrites is investigated by experimental and first-principle computation methods. analysis magnetic, X-ray, Mössbauer measurements BaFe12O19 samples ascertains correlation between thermal factor process annealing their functional properties. remnant polarization at room temperature contradicts description ...

Electromagnetic waves show rapid development in electronics, telecommunications, and the military. One of efforts to overcome effects electromagnetic interference is by developing microwave-absorbing materials. Barium hexaferrite best candidate for as an absorber material. Microwave absorption barium can be increased through Mg-Al doping reducing particle size. This study aimed analyze sonicati...