Synthesis and Magnetic Properties of FeCo
Alloy Nanowire Arrays in Porous Alumina Template
Gao Lumei,Song Xiaoping,Wang Pangpang,Yang Sen
£¨School of Sciences£¬Xi'an¡¡Jiaotong¡¡University£¬Xi'an 710049£¬China£©
Abstract£ºHighly ordered porous anodic aluminum oxide (AAO) membranes were prepared by
electrochemical method. By alternating current electrodepositing, FeCo alloy nanowire
arrays were fabricated in the porous alumina template in a mixed electrolyte of CoSO4
and FeSO4.The microstructures of membranes and nanowire arrays were
characterized by XRD, TEM and VSM. The results show that the Fe0.5Co0.5
nanowire arrays get uniform and regular with a preferred crystal face (200) during
growing, a highly perpendicular magnetic anisotropy with remnant magnetization ratio 0.7
and coercivity (1 700 Oe) for applied field paralleled to the nanowire arrays is
demonstrated. A proper heat treatment enables to greatly enhance the coercivity and
remnant magnetization ratio.
Keywords£ºporous anodic aluminum oxide; nanowire array; electroª²deposition;
perpendicularmagnetic anisotropyª«