Structural, Electrical and Dielectric Properties of Hexa-ferrite-Polyaniline Nano-composites

Journal Article · Tue May 15 04:00:00 EDT 2018 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-017-4332-X· OSTI ID:22771330

Ajmal, Muhammad; Islam, M. U.; Ali, Absar ^[1]

---

1. Bahauddin Zakariya University, Department of Physics (Pakistan)

Ferrite-polyaniline (PANI) composites were prepared by in situ polymerization of polyaniline with the general formula (1 − x) ferrite + (x) PANI where x = 0, 0.25, 0.5, 0.75, 1. The samples were characterized by XRD, SEM, electrical resistivity, and dielectric measurements. X-ray diffraction reveals single phase formation of CaBaCo{sub 2}Al{sub 0.5}Fe{sub 11.5}O{sub 22} Y-type ferrite, whereas polyaniline exhibits an amorphous nature. At room temperature, the resistivity of nano-composites increases with the increase of ferrite filler contents from 3.17 × 10{sup 4} to 3.19 × 10{sup 7} Ω cm. Real and imaginary parts of the complex permittivity of the PANI-ferrite composites follow the Maxwell-Wagner model. Based on the Jonscher Law, the AC conductivity of PANI-ferrite composites experiences an increase with the increase in frequency. The exponent calculated from AC conductivity reveals that the hopping is the likely conduction mechanism. The activation energy obtained from temperature-dependent measurements is consistent with room temperature resistivity. Due to the light weight, low cost and flexibility of design, the ferrite-polymer composites are considered useful for microwave devices.

• OSTI ID: 22771330
• Journal Information: Journal of Superconductivity and Novel Magnetism, Journal Name: Journal of Superconductivity and Novel Magnetism Journal Issue: 5 Vol. 31; ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
DIELECTRIC MATERIALS
ELECTRIC CONDUCTIVITY
FERRITES
MICROWAVE RADIATION
NANOCOMPOSITES
PERMITTIVITY
POLYMERIZATION
POLYMERS
SCANNING ELECTRON MICROSCOPY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION