Tiltable magnetic anisotropy in oblique-deposited Fe arrays using nanoporous anodic aluminum oxides
Resource
Journal of Applied Physics, 108(8), 084318
Journal
Journal of Applied Physics
Pages
84318
Date Issued
2010
Date
2010
Author(s)
Huang, Kai-Tze
Kuo, Po-Cheng
Lin, Ger-Pin
Shen, Chih-Lung
Yao, Yeong-Der
Abstract
Tiltable magnetic anisotropy of self-assembled Fe arrays on nanoporous anodic aluminum oxide has been obtained via oblique evaporation. The rims of the pores, which induce a stacking variation to the stacked atoms, obstructed on the top and shadowed on the inner-wall, aid the formation of isolated arrays with extended “sterns.” The sterns, formed perpendicularly on the unshadowed inner-wall inducing out-of-plane shape anisotropy, dominate the magnetic anisotropy via the coupling to the magnetization of the topmost single-domain array. High perpendicular magnetic anisotropy (1.38×107 ergs/cm3) is induced by the stern at a nominal thickness of 16 nm via 50°-oblique deposition, and capable of tilting with a decrease in shape anisotropy as a result of the decreased oblique angle and increased nominal thickness. The 45°-tilted magnetic anisotropy with independent magnetization reversal is obtained at an oblique angle of about 27.6°.
Type
journal article
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