A HRTEM study of the Ruddlesden-Popper compositions Sr{sub 2}LnMn{sub 2}O{sub 7} (Ln = Y, La, Nd, Eu, Ho)

Journal Article · Mon Jun 01 00:00:00 EDT 1998 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1998.7764· OSTI ID:642228

Sloan, J; Battle, P D; Green, M A; Rosseinsky, M J; Vente, J F ^[1]

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1. Univ. of Oxford (United Kingdom)

High resolution transmission electron microscopy has been used to probe the microstructure of the n = 2 Ruddlesden-Popper manganates Sr{sub 2}LnMn{sub 2}O{sub 7} (Ln = Y, La, Nd, Eu, Ho). Intergrowths of n = 1 (K{sub 2}NiF{sub 4}) are observed only for Ln = La. Intergrowths with n {ge} 5, essentially perovskite microdomains, are seen in the other compositions. The density of perovskite regions is greatest near the edges of the thin specimens, with the n = 2 structure becoming established in the bulk. The complementarity of HRTEM and neutron diffraction is discussed.

• OSTI ID: 642228
• Journal Information: Journal of Solid State Chemistry, Vol. 138, Issue 1; Other Information: PBD: Jun 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MICROSTRUCTURE
RARE EARTHS
OXIDES
STRONTIUM OXIDES
MANGANESE OXIDES
TRANSMISSION ELECTRON MICROSCOPY
PEROVSKITE
LAMELLAE
EXPERIMENTAL DATA