Magnetic Anisotropy and Morphology of Fe Epitaxial Layers Grown on MgO/InAs Heterostructures
- Magnetic Anisotropy and Morphology of Fe Epitaxial Layers Grown on MgO/InAs Heterostructures
- 김경호; 김형준; 안재평; 한준현; 최준우; 장준연
- magnetic anisotropy; Fe; MgO; InAs; MBE; Morphology; Strain; In-Plane Magnetic Anisotropy; Epitaxial Relationship
- Issue Date
- Journal of nanoscience and nanotechnology
- VOL 12, NO 2, 1573-1576
- In-plane magnetic anisotropy and the corresponding morphology of Fe epitaxial layers have been
investigated with respect to underlying MgO growth temperature when epitaxial Fe/MgO layers are
grown on InAs (001) substrates. Coexistence of three-dimensional Fe islands with strong in-plane
textures along <110> and <100> is observed on 4 nm thick MgO layers grown on 200 ℃, leading
to the absence of magnetic anisotropy. Meanwhile, the partially relaxed MgO layers grown above
300 ℃ give rise to two-dimensional Fe layers with cubic magnetic anisotropy. The higher MgO
growth temperature accelerates the two-dimensional layer formation of the subsequent Fe as well
as the advent of cubic anisotropy by reducing underlying strain within the MgO layer.
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