Direct observation of the intergrown α-phase in β-TmAlB4 via high-resolution electron microscopy

Kunio Yubuta, Takao Mori, Andreas Leithe-Jasper, Yuri Grin, Shigeru Okada, Toetsu Shishido

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


A TmAlB4 crystal with a ThMoB4-type (β-type) structure phase related to a hexagonal AlB2-type structure was studied by electron diffraction and high-resolution electron microscopy. A high-resolution image clearly exhibits an intergrown lamellar structure of a YCrB4-type (α-type) phase in the matrix of the β-type phase in TmAlB4 crystal. The lamellar structure can be characterized by a tiling of deformed hexagons, which are a common structure unit in the α-type and β-type structures. The intergrown nanostructure is considered to be attributed to the origin of low temperature anomalies in physical properties.

Original languageEnglish
Pages (from-to)1743-1746
Number of pages4
JournalMaterials Research Bulletin
Issue number8
Publication statusPublished - 2009 Aug 5


  • A. Inorganic compounds
  • C. Electron diffraction
  • C. Electron microscopy
  • D. Crystal structure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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