FexNi(1−x) alloy NPs synthesized by simultaneous metal ions reduction in microemulsion.
Finer NPs synthesized at lower amount of oil and water and higher amount of CTAB.
Chain-like FexNi(1−x) NPs are ferromagnetic; higher aspect ratio, more magnetization.
Spherical FexNi(1−x) NPs with smaller size (7 nm) are superparamagnetic.
Spherical FexNi(1−x) nanoparticles with higher x had increased magnetic properties.