Angular dependence of the coercivity and remanence of ordered arrays of Co nanowires

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• 作者：R. Laví ; n^a ; ^b ; C. Gallardo^a ; J.L. Palma^a ; J. Escrig^a ; ^c ; J.C. Denardin^a ; ^c ; ^{jcdenardin@gmail.com} ; ^{juliano.denardin@usach.cl}
• 关键词：Coercivity and remanence ; Magnetization reversal ; Magnetic nanowire
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2012
• 期刊代码：31_03048853
• 类别：ph
• 出版时间：August, 2012
• 卷：324
• 期：15
• 页码：2360-2362
• 文件大小：388 K

摘要

The angular dependence of the coercivity and remanence of ordered hexagonal arrays of Co nanowires prepared using anodic aluminum oxide templates was investigated. The experimental evolution of coercivity as a function of the angle, in which the external field is applied, is interpreted considering micromagnetic simulations. Depending on the angle between the axis of the wire and the applied magnetic field direction our results show that the magnetization reversal mode changes from vortex to a transverse domain wall. Besides, we observed that the dipolar interactions cause a reduction in coercive fields, mainly in the direction of easy magnetization of the nanowires. Good agreement between numerical and experimental data is obtained.