Linac Coherent Light Source, SLAC National Laboratory, Menlo Park, California, USA.
Phys Rev Lett. 2011 Jul 15;107(3):033904. doi: 10.1103/PhysRevLett.107.033904. Epub 2011 Jul 14.
We report the first proof-of-principle experiment of iterative phase retrieval from magnetic x-ray diffraction. By using the resonant x-ray excitation process and coherent x-ray scattering, we show that linearly polarized soft x rays can be used to image both the amplitude and the phase of magnetic domain structures. We recovered the magnetic structure of an amorphous terbium-cobalt thin film with a spatial resolution of about 75 nm at the Co L3 edge at 778 eV. In comparison with soft x-ray microscopy images recorded with Fresnel zone plate optics at better than 25 nm spatial resolution, we find qualitative agreement in the observed magnetic structure.
我们报告了从磁 X 射线衍射中迭代相位恢复的首个原理验证实验。通过使用共振 X 射线激发过程和相干 X 射线散射，我们表明线性偏振软 X 射线可用于同时对磁畴结构的幅度和相位进行成像。我们恢复了在 778eV 处 Co L3 边缘的约 75nm 空间分辨率的非晶态钬-钴薄膜的磁性结构。与使用 Fresnel 波带片光学器件记录的优于 25nm 空间分辨率的软 X 射线显微镜图像相比，我们发现观察到的磁性结构具有定性一致性。
