Transmission electron microscopy studies of the effect of A-site cation size mismatch and disorder on charge ordering behavior in (La1-xYx)(0.5)(Ca1-ySry)(0.5)MnO3

Authors
Wang, YQ Duan, XF Wang, ZH Shen, BG
Citation
Yq. Wang et al., Transmission electron microscopy studies of the effect of A-site cation size mismatch and disorder on charge ordering behavior in (La1-xYx)(0.5)(Ca1-ySry)(0.5)MnO3, APPL PHYS L, 78(15), 2001, pp. 2157-2159
Citations number
21
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
78
Issue
15
Year of publication
2001
Pages
2157 - 2159
Database
ISI
SICI code
0003-6951(20010409)78:15<2157:TEMSOT>2.0.ZU;2-C
Abstract
The effects of A-site cation mismatch and disorder on the charge ordering ( CO) behavior in the manganites (La1-xYx)(0.5)(Ca1-ySry)(0.5)MnO3 have been studied by transmission electron microscopy. The presence of the size misma tch and disorder suppresses the CO transition. Incommensurate CO modulation s are observed in three samples with 0 less than or equal to sigma (2)less than or equal to0.003. Structural models, based on the selected area electr on diffraction and high-resolution electron microscopy observation, are sug gested for such kinds of incommensurate modulations. (C) 2001 American Inst itute of Physics.