Morphology and magnetic properties of CoFe2O4 nanocables fabricated by electrospinning based on the Kirkendall effect

• CoFe2O4 nanocables were prepared using an electrospinning technique.
• Formation mechanism of nanocables is based on the Kirkendall effect.
• The CoFe2O4 nanocables have a cubic spinel structure.
• The magnetic properties of the CoFe2O4 nanocables were performed.

CoFe2O4 nanocables have been successfully fabricated by electrospinning involving the nanoscale Kirkendall effect. The average diameters of the outer tubes and inner wires of CoFe2O4 nanocables are around 200 nm and 85 nm, respectively. The detailed formation process nanoscale morphology, structure and unique magnetic properties of CoFe2O4 nanocables have been studied comprehensively. Each fully calcined individual nanocable is composed of CoFe2O4 monocrystallites, which stacked along the longitudinal direction with random orientation. The coercivity (Hc) of the CoFe2O4 nanocables decreases from 11043 Oe at 10 K to 707 Oe at 300 K, and a spin reorientation has been detected at 5 K and 100 K, which is different from CoFe2O4 nanorods and nanoparticles.