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MBE-growth of novel MnF2–CaF2 superlattices on Si(111) and their characterization

✍ Scribed by N.S Sokolov; Y Takeda; A.G Banshchikov; J Harada; K Inaba; H Ofuchi; M Tabuchi; N.L Yakovlev

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
413 KB
Volume
162-163
Category
Article
ISSN
0169-4332

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✦ Synopsis

Ž

. Ž . Novel short-period MnF -CaF superlattices SLs on Si 111 substrates have been grown by molecular beam epitaxy. 2 2

The thickness of a MnF layer was 1-3 molecular layers. Reflection high-energy electron diffraction studies indicated the 2 fluorite type of crystal structure of these layers. Fluorescent extended X-ray absorption fine structure measurements supported this observation. Atomic force microscopy measurements showed a flat surface morphology of the SLs. X-ray diffraction measurements revealed well-pronounced superstructural reflections. The width of their v-curve did not exceed 2.5 arc min, which indicated a good crystal quality of the SLs.

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Molecular beam epitaxy was used to grow MnF 2 films on a Si(111) substrate with a thin CaF 2 buffer at room temperature. It was found that films thinner than three molecular layers have a cubic fluorite crystal structure inherited from CaF 2 . The MnF 2 film is coherent to the substrate and has an i