Synthesis and magnetic properties of phase controlled Co single-crystalline nanowires

Single-crystalline hcp and fcc phase Co nanowires were fabricated using simple DC pulse electrodeposition.The X-ray diffraction patterns of Co nanowire arrays prepared at 25 Hz and 1000 Hz pulse frequency shows that all the nanowires have the same orientation. The coercivity and squareness of single-crystalline fcc Co nanowire array are larger than those of hcp. The magnetic properties difference between hcp and fcc Co nanowire arrays is due to their different magnitude of magnetocrystalline anisotropy. Magnetic hysteresis loops at room temperature of the Co nanowire arrays for different crystal structure, with the applied field parallel and perpendicular to the nanowire axis were determined.