TY - JOUR
T1 - Crystallographic features of La1-xSrxMO3 with M = Cr and Fe in the vicinity of the R3̄c/Pbnm phase boundary
AU - Arao, M.
AU - Shindo, H.
AU - Asada, T.
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 - 2002/10/1
Y1 - 2002/10/1
N2 - Crystallographic features of La1-xSrxMO3 with M=Cr and Fe in the vicinity of the R3̄c/Pbnm phase boundary have been examined mainly at room temperature by transmission electron microscopy. When the Sr content x increases from x=0, the change in crystal structure from Pbnm to R3̄c was confirmed to occur at room temperature in La1-xSrxCrO3 around x=0.2. In La1-xSrxFeO3, on the other hand, the incommensurate phase was found to exist between the Pbnm and the R3̄c phases. The analysis of the electron diffraction patterns obtained in the work indicated that the normal structure of the incommensurate structure and the direction of the modulation could, respectively, be identified as the Pbnm structure and one of the 〈323〉 directions. It was also suggested that the rotational displacement of the oxygen octahedra involved in the Pbnm structure should be modulated in the incommensurate structure.
AB - Crystallographic features of La1-xSrxMO3 with M=Cr and Fe in the vicinity of the R3̄c/Pbnm phase boundary have been examined mainly at room temperature by transmission electron microscopy. When the Sr content x increases from x=0, the change in crystal structure from Pbnm to R3̄c was confirmed to occur at room temperature in La1-xSrxCrO3 around x=0.2. In La1-xSrxFeO3, on the other hand, the incommensurate phase was found to exist between the Pbnm and the R3̄c phases. The analysis of the electron diffraction patterns obtained in the work indicated that the normal structure of the incommensurate structure and the direction of the modulation could, respectively, be identified as the Pbnm structure and one of the 〈323〉 directions. It was also suggested that the rotational displacement of the oxygen octahedra involved in the Pbnm structure should be modulated in the incommensurate structure.
KW - Incommensurate structure
KW - LaSrCrO
KW - LaSrFeO
KW - R3̄c-to-Pbnm structural phase transition
KW - Transmission electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=17144475175&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=17144475175&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(02)01398-9
DO - 10.1016/S0921-4534(02)01398-9
M3 - Article
AN - SCOPUS:17144475175
VL - 378-381
SP - 137
EP - 141
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 1
ER -