Co nanowire arrays of different crystal struc-tures have been electrodeposited into self-assembled anodic aluminum oxide (AAO) templates by varying pH value of electrolyte. The XRD results show that crystal structure ...Co nanowire arrays of different crystal struc-tures have been electrodeposited into self-assembled anodic aluminum oxide (AAO) templates by varying pH value of electrolyte. The XRD results show that crystal structure of Co nanowires is fcc structure at pH = 2.5, a mixed structure of fcc and hcp at pH = 3.0 and 3.5, and hcp structure at pH = 5.0. Magnetic measurements indicate that Co nanowire ar-rays of different crystal structures exhibit different magnetic properties. The coercivity of Co nanowire array of fcc struc-ture is larger than that of hcp structure about 900×103/4p A·m-1 along wire axis, and its squareness is also larger than that of hcp structure.展开更多
文摘Co nanowire arrays of different crystal struc-tures have been electrodeposited into self-assembled anodic aluminum oxide (AAO) templates by varying pH value of electrolyte. The XRD results show that crystal structure of Co nanowires is fcc structure at pH = 2.5, a mixed structure of fcc and hcp at pH = 3.0 and 3.5, and hcp structure at pH = 5.0. Magnetic measurements indicate that Co nanowire ar-rays of different crystal structures exhibit different magnetic properties. The coercivity of Co nanowire array of fcc struc-ture is larger than that of hcp structure about 900×103/4p A·m-1 along wire axis, and its squareness is also larger than that of hcp structure.
