Contrast in friction and its inversion observed on metal deposited SrTiO3(100) surfaces

Local variation of frictional properties associated with adatoms of Sr and Cu with SrTiO3(100) surfaces was investigated by friction force microscopy. On the surfaces partially covered with Sr, strong friction was observed on Sr adlayers. In contrast, the areas covered with Cu showed weaker friction...

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Bibliographic Details
Published in:Journal of applied physics 2003-09, Vol.94 (5), p.3082-3090
Main Authors: Shiraki, Susumu, Nantoh, Masashi, Wakatsuchi, Masayuki, Kawai, Maki
Format: Article
Language:English
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Summary:Local variation of frictional properties associated with adatoms of Sr and Cu with SrTiO3(100) surfaces was investigated by friction force microscopy. On the surfaces partially covered with Sr, strong friction was observed on Sr adlayers. In contrast, the areas covered with Cu showed weaker friction than the substrates. We found that a thick Cu layer became easily worn by scanning, so the stepped surface of the substrate appeared in the scanned area. Furthermore, inversion of the contrast in friction between the SrO and TiO2 terraces was observed in the same region during measurement. The origins of this friction behavior will be discussed in terms of the interaction between adsorbates and the substrate.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.1596370