Cargando…

Graphene nanoplatelets (GNPs): a source to bring change in the properties of Co–Ni–Gd-ferrite/GNP nanocomposites

The nanocomposites of Co(0.5)Ni(0.5)Gd(0.03)Fe(1.97)O(4)/graphene nanoplatelets (CNGF/GNPs) were synthesized by a cost-effective sol–gel auto combustion (SGAC) route. The X-ray diffraction analysis confirmed the cubic structure of the as-prepared nanocomposites, and a crystallite size of 32.28 nm wa...

Descripción completa

Detalles Bibliográficos
Autores principales: Latif, Zartashia, Rehman, Atta Ur, Amin, Nasir, Arshad, Muhammad Imran, Marzouki, Riadh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10664697/
https://www.ncbi.nlm.nih.gov/pubmed/38024970
http://dx.doi.org/10.1039/d3ra02080k
Descripción
Sumario:The nanocomposites of Co(0.5)Ni(0.5)Gd(0.03)Fe(1.97)O(4)/graphene nanoplatelets (CNGF/GNPs) were synthesized by a cost-effective sol–gel auto combustion (SGAC) route. The X-ray diffraction analysis confirmed the cubic structure of the as-prepared nanocomposites, and a crystallite size of 32.28 nm was observed for the 7.5 wt% GNPs. Irregular and unique nanoparticles consisting of short stacks of graphene sheets having a platelet shape were confirmed by the morphological analysis of the as-prepared nanocomposites. Raman analysis revealed a spinel crystal structure along with a new vibrational mode due to the GNPs. The energy bandgap was 3.98 eV for the composite with 7.5 wt% GNP concentration. It was observed that the percentage temperature coefficient of resistance (TCR%) rapidly decreased with an increase in temperature both in low- and high-temperature ranges. Dielectric studies carried out in the frequency range 10(4)–10(7) Hz confirmed that the graphene-added composites had high values for both the real and imaginary parts of permittivity at low frequencies. A decrease in saturation magnetization with an increase in GNP concentration was observed compared with the pure CNGF samples. Hence, the as-prepared composites are useful for application in high-frequency devices as well as spintronics.