Heusler compound Ni2FeGa nanoarchitectures

Abstract Heusler type one-dimensional nanogeometries Ni2FeGa have been fabricated in the nanopores of 150 nm AAO (Anodic Aluminium Oxide) templates using simple and low-cost electrodeposition technique at room temperature. The structure of prepared nanoarchitectures is face centered cubic (fcc) with a secondary γ phase. Magnetic properties have been studied at room temperature as well as at low temperatures. It has been found that saturation magnetization MS decreases as temperature rise up. The nanowires have maintained ferromagnetic behavior from 5 K to 350 K. The Ni2FeGa nanowires (NWs) and nanotubes (NTs) have the same saturation magnetization, the difference of the resonance field Hr is mainly attributed to the difference of the anisotropy field Hk under the fixed microwave frequency. Hr for the NT sample is smaller than that for the NW sample.