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Tunable positive magnetoresistance of magnetic polyaniline nanocomposites
- Source :
- Advanced Composites and Hybrid Materials. 4:534-542
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- Tunable positive magnetoresistance (MR) of polyaniline (PANI) nanocomposites with different magnetic nanoparticles (Fe3O4 or CoFe2O4) have been prepared through the facile surface-initiated polymerization (SIP) method. The characterizations including Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) indicate that the magnetic nanoparticles were successfully coated by PANI. A quasi 3D variable range hopping (VRH) mechanism was observed in the magnetic PANI nanocomposites through Mott VRH model. The effects of magnetic field and magnetic nanoparticle on the charge carrier’s behavior were studied by the wave function shrinkage model. The localization length and average hopping length decrease with increasing magnetic field, while the density of state at the Fermi level increases with increasing magnetic field. The enhanced dielectric property and magnetic property of the magnetic PANI nanocomposites were reported as well. Magnetic polyaniline nanocomposites with tunable positive magnetoresistance.
- Subjects :
- Materials science
Polymers and Plastics
Condensed matter physics
Magnetoresistance
Scanning electron microscope
Materials Science (miscellaneous)
Physics::Optics
Dielectric
Variable-range hopping
Magnetic field
Condensed Matter::Materials Science
chemistry.chemical_compound
chemistry
Transmission electron microscopy
Polyaniline
Materials Chemistry
Ceramics and Composites
Magnetic nanoparticles
Subjects
Details
- ISSN :
- 25220136 and 25220128
- Volume :
- 4
- Database :
- OpenAIRE
- Journal :
- Advanced Composites and Hybrid Materials
- Accession number :
- edsair.doi...........bdf43229ca791c5689eb735f6c0ef6e6