Non-Aqueous electro-deposition of novel one-dimensional Sm2Co17 nanostructures and magnetic field annealing effect on structural and magnetic properties

•Fabrication of Sm2Co17 nanowires via non-aqueous electrodeposition.•Heat assisted (300 °C) magnetic field annealing improved the crystallinity.•Magnetization reversal mechanisms and its switching from curling to coherent mode.•Superparamagnetic contributions of very small nanoparticles in blocking state.