Structural analysis of defect structure in rutile TiO<sub>2</sub> by μSR method

DOI

Bibliographic Information

Other Title
  • ミュオンスピン回転・緩和法を用いたルチル型TiO<sub>2</sub>欠陥構造解析

Description

<p>Muon, which has a spin 1/2, finite life time to eject positron in the spin direction and about 1/9 weight of the proton, can be used as a probe to specify the behavior and local structure of hydrogen inside materials. The methodology is called as muon spin rotation/relaxation (μSR) spectroscopy. Recently accelerator based strong pulse muon facilities have been developed and has opened the new feasibility for μSR measurements. TiO2 is the most widely used material as high efficiency photocatalysis. One of the crucial and unrevealed issues are properties of defects, e.g. oxygen vacancies, hydrogen. Recently hydrogen dissolved in TiO2 during preparation process forms impurity states in the band gap to change electron excitation process and electron conductivity. We applied μSR measurement on the TiO2 single crystal in order to understand the behavior and electronic properties of both defects and impurities. In this contribution we will show the muon interaction with oxygen vacancy of TiO2 by zero-field, longitudinal and transverse external field μSR spectra. Those results show stable sites of muon (hydrogen) and electron distribution in the reduced TiO2.</p>

Journal

Details 詳細情報について

  • CRID
    1390009018100156928
  • NII Article ID
    130008134004
  • DOI
    10.14886/jvss.2021.0_1cp09
  • ISSN
    24348589
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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