Magnetic Characterization of Fe0.49Co0.41Ni0.10 Nanowire Arrays by First Order Reversal Curve Diagrams

FeCoNi nanowire arrays with 100 nm diameter were prepared by ac-pulse electrodeposition into thenanopores of hard anodized aluminum oxide templates. The effect of nanowires length on the magnetostaticinteractions was investigated using first order reversal curve method. The Fe0.49Co0.41Ni0.10 nanowires with wires lengthranging from 19 to 41 μm showed interacting pseudo single-domain behavior. The coercivity and squareness enhancedfrom 415 Oe and 0.38 to 460 Oe and 0.46, showing the decrease in magnetostatic interactions between the nanowires.It was detected that an increase in wire length results in an increase in the spread of the distribution in the Hu directionof FORC distribution. This indicates dominant effect of inter-wire magnetostatic interaction to interior exchangeinteraction of nanowires. As the length decreases, a tail appears along Hc axis, the origin of which can be attributed tonon-uniform length distribution of nanowires.

کلیدواژه ها:

First order reversal curves (FORCs) ، magnetic nanowires ، magnetostatic interaction