Preparation and properties of NiFe2O4 nanowires

Polycrystalline NiFe2O4 nanowires have been synthesized by PEG assisted co-precipitation method. The formation mechanism of the nanowires proposed is by means of the orientational aggregation of individual nanoparticles. X-ray diffraction, high resolution scanning electron microscopy, transmission electron microscopy, microRaman and vibrating sample magnetometry studies were carried out. The results show that NiFe2O4 nanowires were in polycrystalline form with diameter of 58 nm. The synthesized nanowires show room temperature ferromagnetic property with high coercivity. This method is expected to be useful for large scale synthesis of NiFe2O4 nanowires for the application of magnetic recording.

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► NiFe2O4 nanowires were synthesized by PEG assisted co-precipitation method.
► The nanowires were formed by orientational aggregation of individual nanoparticles.
► These nanowires show room temperature ferromagnetic property.