Chemical state mapping of p/n‐controlled SrB6 bulk specimens by soft X‐ray emission electron microscope

Masami Terauchi, Yohei K. Sato, Masatoshi Takeda

Research output: Contribution to journalArticlepeer-review

Abstract

Elemental and chemical state maps of p/n‐controlled SrB6 bulk specimens are presented by using a soft X‐ray emission spectroscopy electron microscope. Those bulk specimens were obtained by sintering powder specimens, prepared by the molten‐salt method with different compositions of initial materials. A Sr‐map, a chemical shift map of B K‐emission, and the spectra of characteristic regions of those materials were compared. It was observed that a local Sr deficiency caused a local hole‐doped region, confirmed by a chemical shift in the B K‐emission spectrum. n‐ type SrB6 was rather homogeneous. On the other hand, the p‐type SrB6 bulk specimen was a mixture of two different p‐type regions. This mixed nature originated, presumably, from an uneven Sr content of SrB6 particles prepared by the molten‐salt method using a Sr‐deficient starting material. A separation process of the two types of materials will realize a high‐quality homogeneous p‐type SrB6 bulk specimens.

Original languageEnglish
Article number9588
JournalApplied Sciences (Switzerland)
Volume11
Issue number20
DOIs
Publication statusPublished - 2021 Oct 1

Keywords

  • Chemical shift map
  • Elemental map
  • Hole‐doping
  • Soft X‐ray emission spectroscopy microscope
  • Spectrum imaging

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes

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