Magnetic imaging by x-ray holography using extended references
Magnetic imaging by x-ray holography using extended references
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DOI：
10.1364/oe.19.016223
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发表时间：
2011-08-15
期刊：
影响因子：
3.8
通讯作者：
van der Laan, Gerrit
中科院分区：
文献类型：
--
作者：
Duckworth, Thomas A.;Ogrin, Feodor;van der Laan, Gerrit
我们使用扩展的参考文献演示了傅里叶变换全息术的磁无透镜成像。用一条经过不透明金掩模的狭缝作为全息参照物，用x射线磁性圆二色法获得磁对比度。我们给出了具有垂直磁各向异性的Co/Pt多层膜中磁畴的图像。这项技术比标准傅里叶变换全息术具有优势，在标准傅里叶变换全息术中，小孔被用来定义参考光束。通过扩展基准而增加的强度减少了记录远场衍射图案的计数时间。此外，研究还发现，与孔的相同工艺相比，制造窄缝在技术上要求较低。我们获得了类似于30 nm的空间分辨率，这被发现受到所选择的实验装置的采样周期的限制。(C)2011年美国光学学会
We demonstrate magnetic lensless imaging by Fourier transform holography using extended references. A narrow slit milled through an opaque gold mask is used as a holographic reference and magnetic contrast is obtained by x-ray magnetic circular dichroism. We present images of magnetic domains in a Co/Pt multilayer thin film with perpendicular magnetic anisotropy. This technique holds advantages over standard Fourier transform holography, where small holes are used to define the reference beam. An increased intensity through the extended reference reduces the counting time to record the farfield diffraction pattern. Additionally it was found that manufacturing narrow slits is less technologically demanding than the same procedure for holes. We achieve a spatial resolution of similar to 30 nm, which was found to be limited by the sample period of the chosen experimental setup. (C) 2011 Optical Society of America