Magnetization reversal in FeCo binary alloy nanowire arrays

Abstract

Arrays of FexCo1-x( 0 x 0.51) binary alloy nanowires are fabricated into the (anodic aluminum oxide) AAO template pores by AC electrodeposition. The XRD pattern indicates that the crystallite structure of Co nanowire is hcp with existence of strong (100) orientation along the nanowire axis. While the crystallites structure of FeCo binary alloy nanowires is bcc with existence of strong (110) orientation along the nanowire axes. The peaks shift toward the lower angle when the Fe content of nanowire increases. At room temperature, magnetic measurement results show that FeCo alloy nanowires exhibit excellent magnetic properties. The introduction of Fe improves the magnetic property of Co nanowire compared with that of the Co nanowire. FeCo binary alloy nanowire has a larger coercive force and squareness ratio. The coercivity of the FeCo alloy nanowire is calculated by using a magnetization reversal model based on chains of spheres with coherence rotation mechanism and symmetric fanning mechanism. The magnetization reversal mechanism is supported by chains of spheres with symmetric fanning mechanism.