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Electrospun, Oriented, Ferromagnetic Ni Fe Nanofibers
Vaibhav S Bhugra1, Grant V M Williams1, Shen V Chong2
1School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand.
Frontiers in Chemistry
|March 3, 2020
Summary
Researchers fabricated ferromagnetic nickel-iron (Ni0.47Fe0.53) nanofibers using electrospinning. These nanostructured mats exhibit enhanced magnetic properties, including higher coercivity compared to bulk materials.
Area of Science:
- Materials Science
- Nanotechnology
- Magnetism
Background:
- Electrospinning is a versatile technique for fabricating continuous nanofibers.
- Nanostructured ferromagnetic materials offer unique magnetic properties.
- Nickel-iron (Ni-Fe) alloys are of interest for magnetic applications.
Purpose of the Study:
- To fabricate ferromagnetic Ni0.47Fe0.53 nanofiber mats using electrospinning.
- To characterize the structural and magnetic properties of the synthesized nanofibers.
- To investigate the potential for enhanced magnetic performance in nanostructured Ni-Fe.
Main Methods:
- Electrospinning of a polyvinylpyrrolidone template with nickel and iron precursors.
- Annealing in argon (Ar) and a mixture of Ar and hydrogen (H2) at elevated temperatures (300°C and 600°C).
- Characterization of nanofiber structure, nanocrystal size, and magnetic properties (saturation magnetization, coercivity).
Main Results:
- Successfully fabricated individual, oriented Ni0.47Fe0.53 nanofibers via electrospinning.
- Nanofibers contained Ni0.47Fe0.53 nanocrystals (~14 nm average diameter).
- High saturation magnetic moment comparable to other nanostructured Ni-Fe, with enhanced coercivity over bulk material.
Conclusions:
- Electrospinning provides a viable route to produce nanostructured ferromagnetic Ni0.47Fe0.53 nanofibers.
- The nanostructure contributes to enhanced magnetic properties, including coercivity.
- Potential for tailored magnetic performance in nanoscale Ni-Fe materials.
