Magnetic Anisotropy and Morphology of Fe Epitaxial Layers Grown on MgO/InAs Heterostructures

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Abstract:

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 °C, leading to the absence of magnetic anisotropy. Meanwhile, the partially relaxed MgO layers grown above 300 °C 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.

Keywords: EPITAXIAL RELATIONSHIP; IN-PLANE MAGNETIC ANISOTROPY; MORPHOLOGY; STRAIN

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2012.4673

Publication date: February 1, 2012

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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