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

doi:10.1016/j.materresbull.2009.03.013

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 journal › Article › peer-review

15 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	1743-1746
Number of pages	4
Journal	Materials Research Bulletin
Volume	44
Issue number	8
DOIs	https://doi.org/10.1016/j.materresbull.2009.03.013
Publication status	Published - 2009 Aug 5
Externally published	Yes

Keywords

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

Access to Document

10.1016/j.materresbull.2009.03.013

Cite this

@article{e1e1f7ee05574ec5bced0156785b5d52,

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

abstract = "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.",

keywords = "A. Inorganic compounds, C. Electron diffraction, C. Electron microscopy, D. Crystal structure",

author = "Kunio Yubuta and Takao Mori and Andreas Leithe-Jasper and Yuri Grin and Shigeru Okada and Toetsu Shishido",

note = "Funding Information: This study was partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.",

year = "2009",

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journal = "Materials Research Bulletin",

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T1 - Direct observation of the intergrown α-phase in β-TmAlB4 via high-resolution electron microscopy

AU - Yubuta, Kunio

AU - Mori, Takao

AU - Leithe-Jasper, Andreas

AU - Grin, Yuri

AU - Okada, Shigeru

AU - Shishido, Toetsu

N1 - Funding Information: This study was partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

PY - 2009/8/5

Y1 - 2009/8/5

N2 - 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.

AB - 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.

KW - A. Inorganic compounds

KW - C. Electron diffraction

KW - C. Electron microscopy

KW - D. Crystal structure

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