Magnetocrystalline Anisotropy in Glancing Angle Deposited Permalloy Nanowire Arrays

Show simple item record Mankey, Gary 2019-07-19T14:18:56Z 2019-07-19T14:18:56Z 2005-06-28
dc.identifier.citation Alouach, H., Fujiwara, H., Mankey, G. (2005): Magnetocrystalline Anisotropy in Glancing Angle Deposited Permalloy Nanowire Arrays. Journal of Vacuum Science and Technology A, 23(4). DOI: en_US
dc.description.abstract The magnetic anisotropy and properties of Permalloy (Ni₈₀Fe₂₀) nanowire arrays fabricated by glancing angle deposition with substrate rotation were studied. Epitaxial Cu nanowires, with the long axis textured along the Cu[111] crystallographic direction, were used as a seed layer to grow the Ni₈₀Fe₂₀ nanowires. The nanowires exhibit a strong Ni₈₀Fe₂₀[311] texture as shown by x-ray diffraction, with a Ni₈₀Fe₂₀[111] diffraction peak uniformly distributed about the wire’s long axis normal to the substrate. Hysteresis loops taken at different angular orientations show that the magnetization saturates first along the wire’s growth direction normal to the substrate. Samples with an aspect ratio of approximately one have equal in- and out-of-plane coercivity. At low aspect ratios (∼0.5–1.5), the angular dependence of the remanence shows that the maximum remanence lies on the surface of a cone with its axis along the substrate normal. A model which contains biaxial anisotropy with a symmetry axis normal to the substrate was found to qualitatively explain the characteristics of the observed hysteresis loops. An anisotropy constant on the order of 10⁶erg/cc is necessary to explain the observed behavior, which is much larger than that of bulk Ni₈₀Fe₂₀. en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.subject Nanomaterials en_US
dc.subject Epitaxy en_US
dc.subject Chemical compounds and components en_US
dc.subject Alloys en_US
dc.subject Nanowires en_US
dc.subject Magnetic materials en_US
dc.subject Magnetic anisotropy en_US
dc.subject Geometrical optics en_US
dc.subject X-ray diffraction en_US
dc.subject Thin film deposition en_US
dc.title Magnetocrystalline Anisotropy in Glancing Angle Deposited Permalloy Nanowire Arrays en_US
dc.type text en_US

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