The effect of diameter on micro-magnetic properties of Fe0.68Ni0.32 nanowire arrays

Nanowire arrays of the alloy, Fe 0.68 Ni 0.32 , with different nanowire diameters have been fabricated by the electrochemical deposition method. X-ray diffraction and Mossbauer spectroscopy were employed to characterize the size effect on the structure and micro-magnetic properties of the nanowire array, respectively. The Fe 0.68 Ni 0.32 arrays with different diameters are stabilized in a BCC structure with a [1 1 0] texture oriented along the long axis of the nanowires. The Mossbauer spectra of the nanowire arrays with smaller diameters show an absence of the second and fifth peaks, which then emerge with increasing diameter. The size effects on the hyperfine parameters are discussed.