Preparation and structural analysis of nickel/nickel oxide multilayers
作者:
Tetsuo Kado,
Toshikazu Yamada,
期刊:
Journal of Applied Physics
(AIP Available online 1995)
卷期:
Volume 77,
issue 12
页码: 6651-6657
ISSN:0021-8979
年代: 1995
DOI:10.1063/1.359077
出版商: AIP
数据来源: AIP
摘要:
Metal/oxide multilayers composed of nickel and nickel oxide were prepared on silicon, fused quartz, and sapphire substrates in an ultrahigh vacuum deposition system using two different methods for growing oxide layers: an oxidation method of metal layering using pulsed oxygen molecular beam, and an evaporation method of NiO with an electron beam evaporator. With x‐ray diffraction and calculations using dynamical theory of x‐ray reflection, the films prepared via oxidation with more than 60 pulses of oxygen beam at 298 K, and the films prepared by evaporation below 473 K revealed multilayers of Ni/NiOxwith artificial periodicity. Multilayers prepared with the oxidation method on silicon and fused quartz have homogeneous bilayers composed of polycrystalline Ni and amorphous‐like NiO. In contrast, multilayers prepared by the evaporation method on a sapphire substrate are structurally graded, with layer structures which change gradually from single crystals (1st layer) to polycrystals (last layer). ©1995 American Institute of Physics.
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