Characterization and magnetic properties of Fe70Co30 alloy nanowire arrays

Highly ordered arrays of parallel Fe70Co30 nanowires with a diameter of about 50 nm and a length up to about several tens of micrometers were synthesized by two electrical fields in an anodized aluminum oxide film. The magnetic properties in the temperature range from 5 to 300 K were studied. When the applied field is along the long axis, the temperature dependence of coercivity of Fe70Co30 nanowire arrays shows a linear decrease with temperature increasing, which can be understood by a phenomenological nucleate model. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3103775]