Controlled synthesis, structure and magnetic properties of Fe1−xNix alloy nanoparticles attached on carbon nanotubes

Highly stable Fe–Ni alloy nanoparticles encapsulated in carbon nanotubes: Synthesis, structure and magnetic properties

“…The coercivity of FeNi13@C, FeNi22@C, and FeNi31@C is 47, 68 and 207 Oe, respectively, indicating that the coercivity of the composites increases with the rise of Fe concentration in the Fe-Ni alloys. The results coincide well with the results of Wu et al [24]. According to the theoretical prediction using the random-anisotropy model (RAM) [25], the coercive field is inversely proportional to the six power of the grain size D when the ferromagnetic exchange length exceeds the grain size.…”

Preparation of glass carbon electrode modified with nanocrystalline nickel-decorated carbon nanotubes and electrocatalytic oxidation of methanol in alkaline solution

“…Abdel Rahim et al [6] found that only Ni dispersed on graphite shows a catalytic activity towards methanol oxidation but massive Ni does not. Successful attachment of Ni-based catalysts on the surface of carbon nanotubes is achieved by various approaches such as electrochemical deposition [7], electroless plating [8] and wet chemistry [9]. However, studies on the electrocatalytic oxidation of methanol at a MWCNTs-Ni/GCE in alkaline solutions are not available.…”

Magnetic properties of (Fe)1−x–(Al2O3)x and (Fe50Ni50)1−x–(Al2O3)x nanocomposite magnetic media synthesized using gel like Al2O3 matrix

“…The two types of nanocomposite magnetic media studied in the present work are Fe 1−x -(Al 2 O 3 ) x and (Fe 50 Ni 50 ) 1−x -(Al 2 O 3 ) x where 'x' is varied from 0 wt.% to 15 wt.%. These materials have been chosen because Fe is the classical soft ferromagnetic element while Fe 50 Ni 50 is a soft ferromagnetic alloy [12][13][14][15]. Both these have technological applications in areas such as magnetic information storage, high frequency magnetoresistance and medical diagnostics [16][17][18].…”