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利用直流电化学沉积法,在多孔阳极氧化铝模板中首次制备出了具有[220]取向的单晶面心立方结构的CoCu固溶体合金纳米线阵列,其Co含量高达70%.透射电子显微镜显示纳米线均匀连续,具有较高的长径比,约为300.磁性测量表明所制备的Co_(70)Cu_(30)合金纳米线具有超高的矫顽力H_c//=2438 Oe(1 Oe=79.5775 A/m)和较高的矩形比S//=0.76,远高于以往报道的CoCu合金纳米线的磁性,分析表明磁性好的主要原因是由于较高Co含量和高形状各向异性.通过磁性测量和模型计算,得到Co_(70)Cu_(30)合金纳米线阵列在反磁化过程中遵从对称扇型转动的球链模型,并从结构的角度分析了Co_(70)Cu_(30)合金纳米线阵列的反磁化行为.
The CoCu solid solution alloy nanowire arrays with a [220] oriented single crystal face-centered cubic structure were prepared by direct current electrochemical deposition in a porous anodic alumina template with a Co content of up to 70%. Transmission electron microscopy showed that the nanowires Uniform and continuous with a high aspect ratio of about 300. Magnetic measurements show that the Co_ (70) Cu_ (30) alloy nanowires prepared have extremely high coercivity H_c // = 2438 Oe (1 Oe = 79.5775 A / m) and a higher squareness ratio S // = 0.76, which is much higher than that of CoCu alloy nanowires reported in the past. The analysis shows that the main reason for the good magnetic property is due to higher Co content and high shape anisotropy. (70) Cu_ (30) alloy nanowire arrays with symmetric fanning during the anti-magnetization process are obtained by the magnetic measurements and the model calculations. From the structural point of view, Antimagnetic behavior of nanowire arrays.