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Ordered Ni nanohole arrays with engineered geometrical aspects and magnetic anisotropy

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5 Author(s)
Navas, D. ; Instituto de Ciencia de Materiales, CSIC, 28049 Cantoblanco (Madrid), Spain ; Hernandez-Velez, M. ; Vazquez, M. ; Lee, W.
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Ni nanohole arrays are prepared by a replication process involving sputtering, polymer molding pressing, and electroplating techniques, using anodic alumina membranes as templates. Nanohole diameter to interhole distance ratio is engineered by suitable template processing. From the analysis of the magnetization curves for increasing nanohole diameter, it is concluded that coercivity increases due to the pinning of domain walls to nanoholes, while in-plane anisotropy decreases owing to local shape anisotropy effects.

Published in:

Applied Physics Letters  (Volume:90 ,  Issue: 19 )