Radiation losses in microwave Ku region by conducting pyrrole/barium titanate and barium hexaferrite based nanocomposites

• Published in: Journal of magnetism and magnetic materials 2016-12, Vol.420, p.336-342
• Main Authors: Kaur, Talwinder, Kumar, Sachin, Narang, S.B., Srivastava, A.K.
• Format: Article
• Language: English
• Subjects: Emulsion polymerization; Magneto-electric composite; Radiation loss; Vector network analyzer
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2016.07.058

Nanocomposites of substituted barium hexaferrite and barium titanate embedded in a polymer were synthesized via emulsion polymerization. The study was performed by using X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, electron spin resonance spectroscopy, a vibrating sample magnetometer and a vector network analyzer. It is found that maximum radiation loss occur at 16.09GHz (−14.23dB) frequency owing to the combined effect of conducting polymer, suitable dielectric and magnetic material. This suggests that prepared material is suitable for radiation losses. Micro structural study reveals the presence of all the phases of the compounds comprises composite. Benzene ring absorption band (at 1183cm−1) in FT-IR spectra illustrates the presence of polymer. Surface morphology reveals the presence of array of particles encapsulated by the polymer. [Display omitted] •Composites having polymer, barium titanate and hexaferrite have been successfully prepared.•Effective radiation absorption and losses have been achieved.•Magnetic properties have made an impact on shielding effectiveness.