Ordered magnetic nanohole and antidot arrays prepared through replication from anodic alumina templates |
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Authors: | M Vzquez KR Pirota D Navas A Asenjo M Hernndez-Vlez P Prieto JM Sanz |
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Institution: | aInstituto de Ciencia de Materiales, CSIC, 28049 Madrid, Spain bDepartment Física Aplicada, Universidad Autónoma de Madrid, 28049 Madrid, Spain |
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Abstract: | Highly ordered arrays of Ni nanoholes and Fe20Ni80 antidots have been prepared, respectively, by replica/antireplica processing and sputtering techniques using nanoporous alumina membranes as templates. Geometrical characteristics as nanohole/antidot diameter, interpore distance and the overall hexagonal symmetry of arrays are controlled through the original templates. Experimental data on their hysteresis and magnetic domain structure have been taken by vibrating sample magnetometry and magnetic force microscopy, respectively. An analysis of the magnetization process, resulting magnetic anisotropy and magnetic domain structure is summarized considering the influence of those geometry aspects. In particular, the hexagonal symmetry and the density of nanohole/antidots determine the overall magnetic behavior, which is of interest in future high-density magnetic storage systems. |
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Keywords: | Magnetic nanohole arrays Antidot arrays Magnetization process Magnetic force imaging |
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