Hierro-Rodriguez Aurelio, Gürsoy Doga, Phatak Charudatta, Quirós Carlos, Sorrentino Andrea, Álvarez-Prado Luis Manuel, Vélez Maria, Martín José Ignacio, Alameda José Maria, Pereiro Eva, Ferrer Salvador
ALBA Synchrotron, Cerdanyola del Vallès, Barcelona 08290, Spain.
Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.
J Synchrotron Radiat. 2018 Jul 1;25(Pt 4):1144-1152. doi: 10.1107/S1600577518005829. Epub 2018 May 30.
The development of magnetic nanostructures for applications in spintronics requires methods capable of visualizing their magnetization. Soft X-ray magnetic imaging combined with circular magnetic dichroism allows nanostructures up to 100-300 nm in thickness to be probed with resolutions of 20-40 nm. Here a new iterative tomographic reconstruction method to extract the three-dimensional magnetization configuration from tomographic projections is presented. The vector field is reconstructed by using a modified algebraic reconstruction approach based on solving a set of linear equations in an iterative manner. The application of this method is illustrated with two examples (magnetic nano-disc and micro-square heterostructure) along with comparison of error in reconstructions, and convergence of the algorithm.
开发用于自旋电子学应用的磁性纳米结构需要能够可视化其磁化的方法。软X射线磁成像与圆磁二色性相结合，能够以20 - 40纳米的分辨率探测厚度达100 - 300纳米的纳米结构。本文提出了一种新的迭代断层重建方法，用于从断层投影中提取三维磁化配置。通过使用基于迭代求解一组线性方程的改进代数重建方法来重建矢量场。通过两个示例（磁性纳米盘和微方形异质结构）说明了该方法的应用，并比较了重建误差和算法的收敛情况。
