TY - JOUR
T1 - High-resolution electron microscopy study of misfit-layered Bi-based cobaltites
AU - Yubuta, K.
AU - Begum, S.
AU - Ono, Y.
AU - Miyazaki, Y.
AU - Kajitani, T.
N1 - Funding Information:
This study was partly supported by the Core Research for Evolution Science and Technology (CREST) Project of Japan Science and Technology Agency (JST) and also by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
PY - 2007/7
Y1 - 2007/7
N2 - The structural characteristics of Bi1.84Ca2.00Co1.88Ox and Bi2.49Sr2.00Co2.22Ox are studied by electron diffraction measurements and high-resolution electron microscopy. The crystal structures consist of two interpenetrating subsystems of a CdI2-type CoO2 sheet and a distorted four-layered rock-salt (RS)-type block. Both subsystems have common lattice constants a and c and a angle. The crystal structure is incommensurately modulated parallel to the b-axis. These compounds have modulation vectors, q1 = -a* + 0.58[image omitted] and q2 = 0.18[image omitted] + 0.5c* for the Ca system, and q1 = -a* + 0.54[image omitted] and q2 = 0.05[image omitted] for the Sr system. High-resolution images taken with the incident electron beam parallel to the a- and c-axes clearly exhibit modulated atomic arrangements. The local modulation mode is related to the shear deformation in the a-b plane.
AB - The structural characteristics of Bi1.84Ca2.00Co1.88Ox and Bi2.49Sr2.00Co2.22Ox are studied by electron diffraction measurements and high-resolution electron microscopy. The crystal structures consist of two interpenetrating subsystems of a CdI2-type CoO2 sheet and a distorted four-layered rock-salt (RS)-type block. Both subsystems have common lattice constants a and c and a angle. The crystal structure is incommensurately modulated parallel to the b-axis. These compounds have modulation vectors, q1 = -a* + 0.58[image omitted] and q2 = 0.18[image omitted] + 0.5c* for the Ca system, and q1 = -a* + 0.54[image omitted] and q2 = 0.05[image omitted] for the Sr system. High-resolution images taken with the incident electron beam parallel to the a- and c-axes clearly exhibit modulated atomic arrangements. The local modulation mode is related to the shear deformation in the a-b plane.
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U2 - 10.1080/14786430701264145
DO - 10.1080/14786430701264145
M3 - Article
AN - SCOPUS:34547247903
SN - 1478-6435
VL - 87
SP - 2663
EP - 2669
JO - Philosophical Magazine
JF - Philosophical Magazine
IS - 18-21
ER -