Structural investigation of anion-deficient manganites La{sub 0.7}Sr{sub 0.3}MnO{sub 3-{delta}}

Journal Article · Sat Sep 15 04:00:00 EDT 2007 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774507050094· OSTI ID:21090778

Troyanchuk, I O ^[1]; Bobrikov, I A; Simkin, V G; Balagurov, A M ^[2]

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1. National Academy of Sciences of Belarus, Institute of Solid-State and Semiconductor Physics (Belarus)
2. Joint Institute for Nuclear Research (Russian Federation)

The crystal structure of the anion-deficient manganites La{sub 0.7}Sr{sub 0.3}MnO{sub 3-{delta}} ({delta} = 0, 0.10, 0.15, 0.20) is investigated using high-resolution neutron diffraction. At room temperature, the crystal structure of the stoichiometric manganite La{sub 0.7}Sr{sub 0.3}MnO{sub 3} and the anion-deficient manganite La{sub 0.7}Sr{sub 0.3}MnO{sub 2.9} is satisfactorily described in rhombohedral space group R3-barc. The anion-deficient manganite La{sub 0.7}Sr{sub 0.3}MnO{sub 2.85} is characterized by two perovskite phases with space groups R3-barc and 14/mcm. The crystal structure of the La{sub 0.7}Sr{sub 0.3}MnO{sub 2.8} manganite corresponds to the structure of a perovskite phase with space group I4/mcm. It is established that the phase separation in the crystal structure of the La{sub 0.7}Sr{sub 0.3}MnO{sub 3-{delta}} manganites at a temperature of 293 K is associated with a nonuniform distribution of oxygen vacancies.

• OSTI ID: 21090778
• Journal Information: Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 5 Vol. 52; ISSN CYSTE3; ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NEUTRON DIFFRACTION
PEROVSKITE
SPACE GROUPS
TEMPERATURE RANGE 0273-0400 K
TETRAGONAL LATTICES
TRIGONAL LATTICES
VACANCIES