Fe29Co71 and Fe19Bi81 antidot arrays, with different ajmensions, are prepared with the rf magntron supttering method onto the porous alumina substrate. The size and shape of antidot arrays are characterized by scanning electron microscopy. The glancing angle x-ray diffreaction patterns of Fe29Ci71 and Fe19Ni81 antidot arrays indicate the bcc and fcc structures, respectively. The coercivities of both the alloys show abnormal thickness dependence, whick are discussed qualitatively by considering the pinning and the thickness effect to the films.

Cobalt antidot arrays with different thicknesses are fabricated by rf magnetron sputtering onto porous alumina substrates. Scanning electron microscopy and grazing incidence x-ray diffraction are employed to characterize the morphology and crystal structure of the antidot array, respectively. The temperature dependence of magnetic properties shows that in the temperature range 5D-300K, coercivity and squareness increase firstly, reach their maximum valus, then decrease. T he anomalous temperature dependences of coercivity and squareness are discussed by considering the pinning effect of the antidot and the magntocrystalline anisotropy.

Remanence properties and magntization reversal mechanism of Fe nanowire arrays with diameters 16nm and 130 nm are studies. Isothermal remanent magnetization curves show that the contribution of irreversible magnetization decreases when the diameter changes from 16nm to 130nm. The remanence coercivities of these nanowires obtained in dc-demagnetization curve are about 2400 Oe and 800 Oe, respectively. The magnetization reversal mechanism is different in these two samples. For the nanowire array with diameter 16nm, both the mucleation and the pinning have effects on magnetization reversal mechanism, and the pinning field (about 2500 Oe) is larger than the mucleation field (about 2200 Oe). However, for the nanowire array with diameter 130nm, the magnetization reversal mechanism is dominated by the pinning effect of domain walls.

Nanowire arrays of the alloy, Fe0.68Ni0.32, with different nanowire diameters have been fabricated by the electrochemical deposition method.X-ray diffraction and M.ossbauer spectroscopy were employed to characterize the size effect on the structure and micro-magnetic properties of the nanowire array, respectively.The Fe0.68Ni0.32 arrays with different diameters are stabilized in a BCC structure with a [110] texture oriented along the long axis of the nanowires.The M.ossbauer 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.

用交流电化学沉积方法在阳极氧化铝模板中成功地制备了直径约16nm，长度4μm的Fe1-xNix（0<x≤0.32）合金纳米线。在该成分范围内合金纳米线的结构均为bcc结构，且表现出（110）面的择优取向。穆斯堡尔谱的研究表明由于存在很大的形状各向异性，纳米线内部铁原子的磁矩取向均沿着纳米线的方向。而且随着镍含量的增加，超精细磁场平缓变化，与块体中的变化趋势一致。