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Fabrication of periodic stripes based on self-organization of Ni and C60
Vacík, Jiří ; Naramoto, H.
Fabrication of the self-organized mesoscopic stripe system induced by co-deposition of C60 and Ni on the MgO(001) substrate is reported. It was found that a periodic array of stripe domains is formed if specific deposition kinetics is applied. As a possible mechanism of the stripe formation a step-wise relaxation of the internal stress accumulated in the hybrid composite of the immiscible Ni and C60 (a-C) phases is suggested.
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Epitaxial rectrystalization of the Ni/MgO(001)interface
Vacík, Jiří ; Naramoto, H. ; Yamamoto, S. ; Narumi, K. ; Havránek, Vladimír
Process of recrystallization of the epitaxially grown Ni layer deposited on the MgO(001) single crystal is studied. Thin Ni layer prepared by the vapor deposition of Ni on the MgO substrate kept were annealed between 500 and 1000 0C and systematically analyzed by Rutherford backscattering, X-ray diffraction and atomic force microscopy. Dramatic change in evolution of the crystalline quality was observed during the thermal treatment. The strain and defect density gradually decreased and at the temperature 1000 0C the strain-free Ni/MgO(001) interface was obtained.
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