Hostname: page-component-8448b6f56d-cfpbc Total loading time: 0 Render date: 2024-04-19T22:00:17.791Z Has data issue: false hasContentIssue false
  • English
  • Français

Structural complexity in AA′MM′O6 Perovskites. A Transmission Electron Microscopy Study

Published online by Cambridge University Press:  01 February 2011

Susana García-Martín ,
Esteban Urones-Garrote ,
Meghan C. Knapp ,
Graham King  and
Patrick M. Woodward
Susana García-Martín
Affiliation:
sgmartin@quim.ucm.es, Complutense University, Inorganic Chemistry, Madrid, Spain
Esteban Urones-Garrote
Affiliation:
eurones@uim.ucm.es, Complutense University, Inorganic Chemistry, Madrid, Spain
Meghan C. Knapp
Affiliation:
mknapp@hemistry.ohio-state.edu, The Ohio State University, Department of Chemistry, Columbus, Ohio, United States
Graham King
Affiliation:
gking@chemistry.ohio-state.edu, The Ohio State University, department of Chemistry, Columbus, Ohio, United States
Patrick M. Woodward
Affiliation:
woodward@chemistry.ohio-state.edu, The Ohio State University, Department of Chemistry, Columbus, Ohio, United States
Get access

Abstract

We have prepared five perovskite compounds which have two different A-site cations and examined the ordering of the A-site lattice through powder X-ray diffraction, TEM, HRTEM, HAADF-STEM, STEM-EELS. NaLaTi2O6 and NaLaZr2O6 show no indication of cation ordering by XRD but TEM analysis reveals that the A-site cations are ordered into layers in nanometer domains which have perpendicular orientations of the layers. NaLaMgTeO6 has larger domains which can be detected by XRD. XRD has revealed that both NaLaMgWO6 and KLaMnWO6 have nearly complete long range layered ordering of the A-site cations. TEM microscopy has further shown that a compositional modulation exists in both compounds. NaLaMgWO6 organizes into alternating stripes ˜24Å wide that are compositionally distinct from each other. KLaMnWO6 shows similar behaviour except with a chessboard pattern.

Keywords

microstructuretransmission electron microscopy (TEM)scanning transmission electron microscopy (STEM)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1148: Symposium PP – Solid-State Chemistry of Inorganic Materials VII , 2008 , 1148-PP15-05
Copyright
Copyright © Materials Research Society 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Lufaso, M. W.; Barnes, P. W.; Woodward, P. M. Acta Cryst. B 2006, 62, 397.Google Scholar
2. Mitchell, R.H. Perovskites modern and ancient, Almaz Press Inc. 2002.Google Scholar
3. Guiton, B. S.; Davies, P. K. Nature Mater. 2007, 6, 586.Google Scholar
4. Knapp, M. C; Woodward, P. M. J. Solid State Chem. 2006, 179, 1076.Google Scholar
5. King, G.; Thimmaiah, S.; Dwivedi, A.; Woodward, P. M. Chem. Mater. 2007, 19, 6451.Google Scholar
6. Glazer, A. M. Acta Cryst. B 1972 28, 3384.Google Scholar
7. Glazer, A. M. Acta Cryst. A 1975 31, 756.Google Scholar
8. Woodward, D. Y.; Reany, I. M. Acta Cryst. B 2005, 61, 387.Google Scholar
9. Nellist, P.D. Scanning Transmission Electron Microscopy in “Science of Microscopy”, eds. Hawkes, P. and Spence, J.C.H.. Springer. New York. 2007.Google Scholar
10. García-Martí, S.; Urones-Garrote, E.; Knapp, M. C; King, G.; Woodward, P. M. J. Am. Chem. Soc. 2008, 130 (45), 15028.Google Scholar