TY - JOUR
T1 - Nanometer-sized domain structures in LuFeMO4 (M = Cu, Co) revealed by energy-filtered transmission electron microscopy
AU - Matuso, Y.
AU - Hirata, A.
AU - Horibe, Y.
AU - Yoshii, K.
AU - Ikeda, N.
AU - Mori, S.
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Scientific Research on Priority Areas “Novel States of Matter Induced by Frustration” (No.19052002) and KIBAN (B) (No.20340078) from the Ministry of Education, Culture, Sports, Science, and Technology in Japan. One of the authors (SM) was supported financially by the Murata Scientific Research foundation.
PY - 2009
Y1 - 2009
N2 - Diluted effect on the charge ordered (CO) structure in dielectric materials LuFeMO4 (M = Cu, Co) were investigated by an energy-filtered transmission electron microscopy (TEM), in combination with a conventional TEM. It is revealed that partial substitution of Cu2 + and Co2 + for Fe2 +in LuFe2O4 destabilized the CO structure. In LuFeCuO4, there exist characteristic zigzag-shaped diffuse streaks and diffuse spots at the h/3-δ h/3-δ 0-type positions (h: integer, δ = 0.06) in reciprocal space, which originate from static cationic ordering of Fe3 + and Cu2 + ions in the triangular lattice. Moreover, real-space images by the energy-filtered TEM revealed that nanometer-sized domain structures with the 5∼10 nm size are formed. In contrast, honeycomb-shaped diffuse streaks were found in LuFeCoO4, in which no domain structures are observed in real-space images.
AB - Diluted effect on the charge ordered (CO) structure in dielectric materials LuFeMO4 (M = Cu, Co) were investigated by an energy-filtered transmission electron microscopy (TEM), in combination with a conventional TEM. It is revealed that partial substitution of Cu2 + and Co2 + for Fe2 +in LuFe2O4 destabilized the CO structure. In LuFeCuO4, there exist characteristic zigzag-shaped diffuse streaks and diffuse spots at the h/3-δ h/3-δ 0-type positions (h: integer, δ = 0.06) in reciprocal space, which originate from static cationic ordering of Fe3 + and Cu2 + ions in the triangular lattice. Moreover, real-space images by the energy-filtered TEM revealed that nanometer-sized domain structures with the 5∼10 nm size are formed. In contrast, honeycomb-shaped diffuse streaks were found in LuFeCoO4, in which no domain structures are observed in real-space images.
KW - Dielectric material
KW - Electron diffraction
KW - Energy-filtered TEM
KW - Nanometer-sized domains
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U2 - 10.1080/00150190902873204
DO - 10.1080/00150190902873204
M3 - Conference article
AN - SCOPUS:77749316227
SN - 0015-0193
VL - 380
SP - 56
EP - 62
JO - Ferroelectrics
JF - Ferroelectrics
IS - 1 PART 1
T2 - 6th Asian Meeting on Ferroelectrics, AMF-6
Y2 - 2 August 2008 through 6 August 2008
ER -