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Growth and Characterization of Epitaxial Fe Nanoislands on Si(001): Size Effects on Ferromagnetic Anisotropy

机译:Si(001)上外延Fe纳米岛的生长和表征:铁磁各向异性的尺寸效应

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摘要

Self-assembled Fe islands were successfully grown on Si(001) by ion-beam sputtering at room temperature. We present a combined study on the growth, structure, and magnetic properties of Fe islands on Si(001). Nanometer-scale iron islands, ranging from 25 to 100 nm with narrow size distributions, can be achieved with a silicide interfacial layer analogous to the S-K growth mode. High-resolution transmission electron microscopy results confirm the epitaxial nature of the Fe islands with Si. Furthermore, magnetic anisotropy of different-sized islands has been Studied by superconducting quantum interference device measurements. The perpendicular magnetic anisotropy falls away with increasing island size. We found that surface effects from the morphologies of three-dimensional islands are mainly responsible for the spin reorientation.
机译:在室温下,通过离子束溅射在Si(001)上成功生长了自组装的Fe岛。我们目前对Si(001)上Fe岛的生长,结构和磁性进行了综合研究。可以使用类似于S-K生长模式的硅化物界面层来实现纳米尺寸的铁岛,其范围从25到100 nm,尺寸分布窄。高分辨率透射电子显微镜结果证实了具有Si的Fe岛的外延性质。此外,通过超导量子干涉仪的测量研究了不同大小岛的磁各向异性。垂直磁各向异性随岛尺寸的增加而消失。我们发现,三维岛形态的表面效应主要负责自旋的重新定向。

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