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利用电化学沉积方法在同一种富Co2+溶液Co2+/Cu2+=10∶1中,利用不同的沉积电位成功地制备了一系列不同成分(x=0.38—0.87)和复合相结构的CoxCu1-x纳米线阵列.发现随着纳米线中Cu含量的变化,CoxCu1-x纳米线的复相结构随之发生规律的变化,最终导致纳米线的磁性也随之规律的变化.随着纳米线中Cu含量的不断增加,一部分Cu与Co形成面心立方结构(fcc)的CoCu固溶体,减弱了磁晶各向异性与形状各向异性的竞争,从而提高样品的方形度;一部分Cu以fcc结构的Cu单质的形式存在于纳米线中,并随着Cu颗粒大小的不同分别起到破坏磁晶各向异性和钉扎畴壁的作用,从而增加纳米线的方形度和矫顽力.对比不同成分的样品,发现CoxCu1-x纳米线的方形度和矫顽力的最大值分别出现在Co75Cu25和Co60Cu40中,并且由于其特殊的复相结构致使它们的值要好于相同直径的单相结构的结果.
A series of CoxCu1-x nanowires with different compositions (x = 0.38-0.87) and complex phase structures were successfully prepared by electrochemical deposition in the same Co2 + / Cu2 + = 10:1 Co2 + Array.It is found that with the change of Cu content in nanowires, the complex phase structure of CoxCu1-x nanowires changes regularly, which eventually leads to the magnetic changes of nanowires.With the Cu content in nanowires The part of Cu and Co to form a fcc CoCu solid solution weakens the competition between the magnetocrystalline anisotropy and the shape anisotropy so as to increase the squareness of the sample. Form exists in the nanowires, and with the size of the Cu particles respectively damage the magnetocrystalline anisotropy and pinned the role of the domain wall, thereby increasing the squareness and coercivity of nanowires.Compared with different components of the sample, It was found that the squareness and coercivity maximum of CoxCu1-x nanowires appear in Co75Cu25 and Co60Cu40, respectively, and their values are better than those of single-phase structures of the same diameter due to their special complex phase structure.