STM observation of metal-nonmetal granuler thin films
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概要
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We have observed scanning tunneling microscopy (STM) topographic images for structural characterization and measured current-voltage (I-V) spectra (scanning tunneling spectroscopy: STS) for the investigation of local transport properties of Co-Al-O granular thin films exhibiting tunnel-type giant magnetoresistance (GMR). STM topographic images indicated round-shaped bright regions and dark channels, which are associated with Co granules and Al-oxide, respectively. From the I-V characteristics the electronic charging effect, i.e., the effect of Coulomb blockade, was confirmed. In addition, the tunneling current varied stepwise as a function of the voltage, suggesting the appearance of a Coulomb staircase.
- 社団法人日本磁気学会の論文
- 1999-01-20
著者
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Chiba J
Institute For Materials Research Tohoku University
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Chiba J.
Institute for Materials Research, Tohoku University
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Mitani S.
Institute for Materials Research, Tohoku University
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Takanashi K.
Institute for Materials Research, Tohoku University
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Fujimori H.
Institute for Materials Research, Tohoku University
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Mitani S
Institute Of Materials Research Tohoku University
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Mitani S.
Institute For Materials Research Tohoku University
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Takanashi K.
Institute For Materials Research Tohoku Univ.
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Fujimori H.
Institute For Materials Research Tohoku Univ.
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