Magnetic anisotropy of one-dimensional Co nanostructures

Michel Daher Mansour; Romain Parret; Fabien Cheynis; Matthieu Petit; Fadi Choueikani; Lisa Michez; Laurence Masson

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Magnetic anisotropy of one-dimensional Co nanostructures

机译：一维CO纳米结构的磁各向异性

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We report a combined scanning tunneling microscopy and x-ray magnetic circular dichroism study to investigate the structural properties and magnetic behavior of a Co ultrathin film composed of dimer nanolines. These Co nanolines, ～6 nm in length, are grown on a Si nanotemplate composed of nanoribbons self-organized on Ag(110). The first two Co layers present a weak magnetic response while upper Co layers exhibit an enhanced magnetization. Orbital and spin moments are experimentally determined. We show that an in-plane magnetization is favored and the magnetic anisotropy energy associated with the directions parallel and perpendicular to the nanolines are measured. The Co ultrathin film is shown to behave as a superparamagnetic system composed of one-dimensional segments containing each ～170 ferromagnetically coupled Co atoms, with a blocking temperature estimated to be between 20 and 40 K. Our set of experiments allows for a comprehensive description of the magnetic behavior of the Co nanoline ultrathin film grown on a functionalized metallic substrate.

机译：我们报告了一种组合扫描隧道显微镜和X射线磁性圆形二色性研究，以研究由二聚体纳米组成的CO超薄膜的结构性和磁力。这些Co纳米载载载载载载载载体长度为〜6nm，在Si纳米模式上生长在Ag（110）上自组织的纳米波堡组成。前两个CO层呈现弱磁响应，而上部CO层表现出增强的磁化。实验确定轨道和旋转矩。我们表明，测量有利于面内磁化，并且测量与平行且垂直于纳米载体的方向相关的磁各向异性能。示出了CO超薄薄膜的表现为由含有每个〜170铁磁性耦合的CO原子的一维区段组成的超顺磁系统，其估计在20至40k之间。我们的一组实验允许综合描述官能化金属基材生长Co纳米超薄膜的磁性特性。

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《Physical review》 |2020年第15期|155403.1-155403.7|共7页
作者
Michel Daher Mansour; Romain Parret; Fabien Cheynis; Matthieu Petit; Fadi Choueikani; Lisa Michez; Laurence Masson;
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Aix Marseille Univ CNRS CINaM Campus de Luminy Case 913 13288 Marseille Cedex 9 France;

Aix Marseille Univ CNRS CINaM Campus de Luminy Case 913 13288 Marseille Cedex 9 France;

Aix Marseille Univ CNRS CINaM Campus de Luminy Case 913 13288 Marseille Cedex 9 France;

Aix Marseille Univ CNRS CINaM Campus de Luminy Case 913 13288 Marseille Cedex 9 France;

Synchrotron SOLEIL L'Orme des Merisiers Saint-Aubin - BP 48 91192 Gif-sur-Yvette Cedex France;

Aix Marseille Univ CNRS CINaM Campus de Luminy Case 913 13288 Marseille Cedex 9 France;

Aix Marseille Univ CNRS CINaM Campus de Luminy Case 913 13288 Marseille Cedex 9 France;

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8. Magnetic Anisotropy of a One-Dimensional Electron System [R] . Smith, T. P., Brum, J. A., Hong, J. M., 1988

机译：一维电子系统的磁各向异性

Magnetic anisotropy of one-dimensional Co nanostructures

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