Physics of the Solid State
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Measurement of step heights on a crystal surface using synchrotron phase contrast imaging
Argunova T. S. 1, Kohn V.G. 2, Lim J.-H.3, Krymov V.M. 1, Ankudinov A.V. 1
1Ioffe Institute, St. Petersburg, Russia
2National Research Center “Kurchatov Institute”, Moscow, Russia
3Pohang Accelerator Laboratory, POSTECH, Pohang, Korea
Email: argunova@mail.ioffe.ru, kohnvict@yandex.ru, limjh@postech.ac.kr, v.krymov@mail.ioffe.ru, Alexander.Ankudinov@mail.ioffe.ru

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An experimental and theoretical study of surface step heights on a basal-faceted sapphire ribbon grown using the Stepanov's method was carried out. Obtained results were compared with atomic force microscopy data. We established that the step heights on the order of 1 μm could be determined using simple in-line phase-contrast imaging setup. Keywords: synchrotron radiation, phase contrast, microrelief, sapphire, Stepanov's method.
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