Fabrication and magnetic property of binary Co–Ni nanowire array by alternating current electrodeposition

Ordered binary Co–Ni nanowire arrays with different components have successfully been fabricated by ac electrodeposition. The as-obtained nanowires exhibit a diameter of about 49.2 nm and aspect ratio of more than 30. A highly preferential orientation of the Co–Ni nanowires has been obtained by XRD. The magnetic properties of Co–Ni nanowire arrays determined by VSM are as the function of the Co–Ni components. The maximum value of coercivities perpendicular to the array is 2073 Oe. However, the magnetic properties of such nanowire arrays exhibited a bad thermal stability at the medium temperature of 200 8C.