Ordered nanostructure arrays of Ni-Al2O3 were synthesized by direct current electro-deposition in anodic alumina membranes (AAM). The investigation with an electron microscope,an X-ray diffractmeter and a vibration sample magnetometer indicates that the Ni nanowires, growing in the pores of AAM with about 45nm in diameter, are monocrystalline and have a definite preferred crystallizing orientation. The magnetic behavior of the arrays and their mechanism were discussed.
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