Electrochemical fabrication and magnetic properties of Fe _7Co_3 alloy nanowire array

摘要

A new type of magnetic material, Fe_7Co_3 nanowires, was successfully synthesized for the first time via a simple electrodeposition method. Highly uniform, self-ordered porous anodic aluminum oxide (AAO) membranes were prepared by the way of electrochemical. Fe_7Co _3 alloy nanowire arrays were fabricated in the porous alumina template in an aqueous solution of FeCl_2 and CoCl_2 by direct current electrodepositing. The microstructures of nanowires and AAO template were characterized by XRD, SEM, and TEM. The results show that a single Fe_7Co_3 nanowire is 40 nm in width and 2.5 μm in length with a preferred crystal face (110) during growing. The Fe_7Co _3 nanowire arrays have uniaxial magnetic anisotropy with easy magnetization direction along the nanowire axis due to the large shape anisotropy. It also shows that Fe_7Co_3 nanowire is a well-soft magnetic phase compared with Fe nanowires. It illustrates that Fe _7Co_3 possess higher saturation magnetization.