TY - JOUR
T1 - Features of the Jahn-Teller displacements in LaTiO3
AU - Arao, M.
AU - Inoue, Y.
AU - Koyama, Y.
N1 - Funding Information:
One of us (M.A.) would like to thank the Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists for financial support. A part of this work is financially supported by Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science.
PY - 2002
Y1 - 2002
N2 - Atomic displacements involved in a crystal structure of LaTiO3 have been investigated by means of transmission electron microscopy mainly at room temperature. Electron diffraction patterns taken from LaTiO3 were found to be characterized by the presence of the forbidden reflections for the Pnma structure. The extinction rule of these reflections including fundamental ones indicated that a space group of the crystal structure was determined to be P21/a with a monoclinic symmetry. A characteristic feature of the P21/a structure is that there exist the Jahn-Teller atomic displacement with q = 〈1/21/2 0〉c as well as the Jahn-Teller distortion. An additional displacement with q = 〈1/2 0 0〉c should also be needed.
AB - Atomic displacements involved in a crystal structure of LaTiO3 have been investigated by means of transmission electron microscopy mainly at room temperature. Electron diffraction patterns taken from LaTiO3 were found to be characterized by the presence of the forbidden reflections for the Pnma structure. The extinction rule of these reflections including fundamental ones indicated that a space group of the crystal structure was determined to be P21/a with a monoclinic symmetry. A characteristic feature of the P21/a structure is that there exist the Jahn-Teller atomic displacement with q = 〈1/21/2 0〉c as well as the Jahn-Teller distortion. An additional displacement with q = 〈1/2 0 0〉c should also be needed.
KW - A. Electronic materials
KW - A. Magnetic materials
KW - C. Electron microscopy
KW - D. Crystal structure
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U2 - 10.1016/S0022-3697(02)00054-9
DO - 10.1016/S0022-3697(02)00054-9
M3 - Article
AN - SCOPUS:0036602551
SN - 0022-3697
VL - 63
SP - 995
EP - 997
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
IS - 6-8
ER -