TY - JOUR
T1 - Intergrowth structure of α-phase in β-type TmAlB4 compound studied by high-angle annular detector dark-field scanning transmission electron microscopy
AU - Yubuta, Kunio
AU - Mori, Takao
AU - Leithe-Jasper, Andreas
AU - Borrmann, Horst
AU - Grin, Yuri
AU - Okada, Shigeru
AU - Shishido, Toetsu
N1 - Funding Information:
A part of this work was supported by Grant-in-Aid for Scientific Research from Japan Society for the Promotion of Science (JSPS) : Grant Program of Scientific Research (B) (Grant no. 24360284 ). T.M. was partially supported by a grant from AOARD
PY - 2014/11/1
Y1 - 2014/11/1
N2 - Nanostructure of a ThMoB4-type (β-type) TmAlB4 compound, in which YCrB4-type (α-type) domains are locally intergrown, is studied by high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). Z-contrast images by HAADF-STEM directly represent the arrangements of Tm atoms located at centers of heptagonal atomic columns of B atoms as bright dots, and give us detailed information of intergrowth of type domains in the matrix of the β-type phase, which coherently occurs. Structural and bonding analyses for β-TmAlB4 point out the closeness in atomic interactions and energy of the α- and β-type structures which support the easy formation of such nanostructure intergrowths. From combination between HAADF-STEM and electronic structure calculation, a detailed local crystal structure with intrinsic building defects is effectively revealed.
AB - Nanostructure of a ThMoB4-type (β-type) TmAlB4 compound, in which YCrB4-type (α-type) domains are locally intergrown, is studied by high-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM). Z-contrast images by HAADF-STEM directly represent the arrangements of Tm atoms located at centers of heptagonal atomic columns of B atoms as bright dots, and give us detailed information of intergrowth of type domains in the matrix of the β-type phase, which coherently occurs. Structural and bonding analyses for β-TmAlB4 point out the closeness in atomic interactions and energy of the α- and β-type structures which support the easy formation of such nanostructure intergrowths. From combination between HAADF-STEM and electronic structure calculation, a detailed local crystal structure with intrinsic building defects is effectively revealed.
KW - Building defect
KW - High-angle annular detector dark-field scanning transmission electron microscopy (HAADF-STEM)
KW - Intergrowth
KW - Nanostructure
KW - Rare earth aluminoboride
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U2 - 10.1016/j.jssc.2014.07.038
DO - 10.1016/j.jssc.2014.07.038
M3 - Article
AN - SCOPUS:84987732425
VL - 219
SP - 274
EP - 279
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
SN - 0022-4596
ER -