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Fabrication of Nickel NanoChains/PVDF Nanocomposites and Their Electrical/Magnetic Properties
Author(s) -
Martin Baptiste,
Dantras Eric,
Lonjon Antoine,
Laffont Lydia,
Lacabanne Colette
Publication year - 2019
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201900158
Subject(s) - materials science , nanocomposite , percolation threshold , composite number , scanning electron microscope , composite material , coercivity , anisotropy , electrical resistivity and conductivity , nanotechnology , condensed matter physics , electrical engineering , engineering , physics , quantum mechanics
Magnetic nickel nanoparticles (NPs) and nanochains (NNCs) are grown in a polyol medium under a static field as an alternative to template electrodeposition and strong reducers. Scanning electron microscopy (SEM) images and their statistical analysis show an important aspect ratio of 75 for NNCs. These NNCs present enhanced magnetic properties in terms of coercive field ( H C = 163 Oe) and saturation magnetization ( M S = 10.8 emu g −1 ). Nanocomposites of NNCs/PVDF are fabricated with 2 %vol. NNCs and present better properties than NPs/PVDF with higher filler content. The longitudinal and transverse magnetic properties of the composite are measured showing that higher properties are recorded in the longitudinal direction. Electrical conductivity of composite is plotted as a function of NNCs volume content to determine the electrical percolation threshold. The corresponding value of the apparent aspect ratio (ξ = 70) confirms that the processing of composite does not modify the particles morphology. Thus, it explains the enhancement of the magnetic properties due to the NNCs anisotropy.