Structural, dielectric and magnetic studies on polyaniline-decorated Ni0.5Cu0.5Fe2O4 nanoferrites for electromagnetic interference shielding applications

被引：7
作者：
Gurusiddesh, M. [1 ]
Madhu, B. J. [2 ]
Shankaramurthy, G. J. [3 ]
Shruthi, B. [4 ]
机构：
[1] Visvesvaraya Technol Univ RRC, Dept Phys, Belagavi 590018, India
[2] Govt Sci Coll, Post Grad Dept Phys, Chitradurga 577501, India
[3] UBDT Coll Engn, Dept Phys, Davangere 577002, India
[4] Dr Ambedkar Inst Technol, Dept Chem, Bangalore 560056, Karnataka, India
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2020年 / 126卷 / 02期
关键词：
Chemical synthesis; Composite materials; Dielectric behavior; Magnetic properties; Electromagnetic shielding effectiveness; FERRITE; CARBON; NANOCOMPOSITES; CONDUCTIVITY; COMPOSITE; BEHAVIOR;
D O I：
10.1007/s00339-019-3268-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
With the aim of developing effective electromagnetic interference (EMI) shielding materials, polyaniline-decorated Ni0.5Cu0.5Fe2O4 nanoferrites were synthesized via in situ polymerization method. Synthesized samples were characterized using different techniques such as X-ray diffraction analysis, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy. Thermal behavior of polyaniline (PAni)/Ni0.5Cu0.5Fe2O4 composites is studied in the temperature range 25-700 degrees C. Present Ni0.5Cu0.5Fe2O4 nanoparticles and PAni/Ni0.5Cu0.5Fe2O4 composites exhibited hysteretic behavior in the studied magnetic field range. Values of saturation magnetization and coercivity for Ni0.5Cu0.5Fe2O4 nanoparticles decrease with coating of polyaniline due to increase in particle-particle separation which reduces the inter-particle interaction. Maximum EMI shielding effectiveness (SE) values obtained for Ni0.5Cu0.5Fe2O4 nanoparticles and PAni/Ni0.5Cu0.5Fe2O4 composites are 11.54 dB and 66.56 dB, respectively. Secured higher SE values shows that the composites possess great potential in EMI shielding applications.
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页数：9
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