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Microstructural changes of epitaxial Fe/MgO layers grown on InAs(001) substrates

机译:在InAs(001)衬底上生长的外延Fe / MgO层的微观结构变化

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The microstructural evolution and the effect on in-plane magnetic properties of epitaxial Fe/MgO layers grown on InAs(001) substrates have been investigated as a function of MgO growth temperature. The Fe grows three-dimensional islands with two different in-plane textures along [010] and [11?0] directions on the MgO layers grown below 200 °C in remarkable contrast to two-dimensional Fe layers on the MgO layers grown above 300 °C. As the MgO growth temperature increases, both tensile-strained MgO and the subsequent Fe are simultaneously relaxed, and the distribution of 45°-rotated Fe lattices with [010] texture becomes dominant. The experimental results imply that the microstructural evolution of the Fe is strongly influenced by the underlying misfit strain within the MgO layers grown at different temperatures. The two different epitaxial relationships of the Fe islands lead to no magnetic anisotropy, while the Fe layer with the single epitaxial relationship of Fe[010]//MgO[11?0]//InAs[11?0] shows cubic magnetic anisotropy.
机译:研究了在InAs(001)衬底上生长的外延Fe / MgO层的微观结构演变及其对面内磁性能的影响,该关系是MgO生长温度的函数。在200°C以下生长的MgO层上,Fe沿[010]和[11?0]方向生长具有两个不同平面内织构的三维岛,与300°C以上生长的MgO层上的二维Fe层形成明显对比℃。随着MgO生长温度的升高,拉伸应变的MgO和随后的Fe会同时松弛,具有[010]织构的45°旋转Fe晶格的分布将占主导地位。实验结果表明,在不同温度下生长的MgO层中,潜在的失配应变对Fe的微结构演变有很大影响。 Fe岛的两种不同的外延关系不引起磁各向异性,而具有Fe [010] // MgO [11→0] // InAs [11→0]的单外延关系的Fe层显示立方磁各向异性。

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