Synthesis and Characterization of the Reduced Single-Layer Manganite Sr2MnO3.5+x

L. J. Gillie, A. J. Wright, J. Hadermann, G. Van Tendeloo, C. Greaves

Research output: Contribution to journalArticle

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Abstract

The nuclear and magnetic structures of polycrystalline Sr2MnO3.5 have been determined by the Rietveld analysis of neutron powder diffraction data and electron diffraction techniques. The pure Mn3+ single-layered phase crystallizes in the primitive monoclinic space-group P21/c with lattice constants a = 6.8524(3) Å; b = 10.8131(4) Å; c = 10.8068(4) Å; β = 113.247(4)°. The oxygen defects form an ordered superstructure within the perovskite block layers consisting of interconnected MnO5 square pyramids, slightly different from those observed for the defect perovskites SrMnO2.5 and Ca2MnO3.5. Magnetic susceptibility studies show a broad transition at ∼280K, which is attributed to an overall antiferromagnetic ordering of spins, which leads to doubling of the unit cell along [100]. The magnetic unit cell comprises ferromagnetic clusters of four corner-sharing MnO5 pyramids, which are antiferromagnetically aligned to other similar clusters within the perovskite block layers.

LanguageEnglish
Pages145-151
Number of pages7
JournalJournal of Solid State Chemistry
Volume167
Issue number1
DOIs
Publication statusPublished - Aug 2002
Externally publishedYes

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pyramids
Perovskite
Rietveld analysis
Defects
Neutron powder diffraction
Magnetic structure
defects
perovskites
synthesis
nuclear structure
cells
Magnetic susceptibility
diffraction
Electron diffraction
Lattice constants
electron diffraction
Oxygen
magnetic permeability
neutrons
oxygen

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Gillie, L. J. ; Wright, A. J. ; Hadermann, J. ; Van Tendeloo, G. ; Greaves, C. / Synthesis and Characterization of the Reduced Single-Layer Manganite Sr2MnO3.5+x. In: Journal of Solid State Chemistry. 2002 ; Vol. 167, No. 1. pp. 145-151.
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abstract = "The nuclear and magnetic structures of polycrystalline Sr2MnO3.5 have been determined by the Rietveld analysis of neutron powder diffraction data and electron diffraction techniques. The pure Mn3+ single-layered phase crystallizes in the primitive monoclinic space-group P21/c with lattice constants a = 6.8524(3) {\AA}; b = 10.8131(4) {\AA}; c = 10.8068(4) {\AA}; β = 113.247(4)°. The oxygen defects form an ordered superstructure within the perovskite block layers consisting of interconnected MnO5 square pyramids, slightly different from those observed for the defect perovskites SrMnO2.5 and Ca2MnO3.5. Magnetic susceptibility studies show a broad transition at ∼280K, which is attributed to an overall antiferromagnetic ordering of spins, which leads to doubling of the unit cell along [100]. The magnetic unit cell comprises ferromagnetic clusters of four corner-sharing MnO5 pyramids, which are antiferromagnetically aligned to other similar clusters within the perovskite block layers.",
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Synthesis and Characterization of the Reduced Single-Layer Manganite Sr2MnO3.5+x. / Gillie, L. J.; Wright, A. J.; Hadermann, J.; Van Tendeloo, G.; Greaves, C.

In: Journal of Solid State Chemistry, Vol. 167, No. 1, 08.2002, p. 145-151.

Research output: Contribution to journalArticle

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T1 - Synthesis and Characterization of the Reduced Single-Layer Manganite Sr2MnO3.5+x

AU - Gillie, L. J.

AU - Wright, A. J.

AU - Hadermann, J.

AU - Van Tendeloo, G.

AU - Greaves, C.

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N2 - The nuclear and magnetic structures of polycrystalline Sr2MnO3.5 have been determined by the Rietveld analysis of neutron powder diffraction data and electron diffraction techniques. The pure Mn3+ single-layered phase crystallizes in the primitive monoclinic space-group P21/c with lattice constants a = 6.8524(3) Å; b = 10.8131(4) Å; c = 10.8068(4) Å; β = 113.247(4)°. The oxygen defects form an ordered superstructure within the perovskite block layers consisting of interconnected MnO5 square pyramids, slightly different from those observed for the defect perovskites SrMnO2.5 and Ca2MnO3.5. Magnetic susceptibility studies show a broad transition at ∼280K, which is attributed to an overall antiferromagnetic ordering of spins, which leads to doubling of the unit cell along [100]. The magnetic unit cell comprises ferromagnetic clusters of four corner-sharing MnO5 pyramids, which are antiferromagnetically aligned to other similar clusters within the perovskite block layers.

AB - The nuclear and magnetic structures of polycrystalline Sr2MnO3.5 have been determined by the Rietveld analysis of neutron powder diffraction data and electron diffraction techniques. The pure Mn3+ single-layered phase crystallizes in the primitive monoclinic space-group P21/c with lattice constants a = 6.8524(3) Å; b = 10.8131(4) Å; c = 10.8068(4) Å; β = 113.247(4)°. The oxygen defects form an ordered superstructure within the perovskite block layers consisting of interconnected MnO5 square pyramids, slightly different from those observed for the defect perovskites SrMnO2.5 and Ca2MnO3.5. Magnetic susceptibility studies show a broad transition at ∼280K, which is attributed to an overall antiferromagnetic ordering of spins, which leads to doubling of the unit cell along [100]. The magnetic unit cell comprises ferromagnetic clusters of four corner-sharing MnO5 pyramids, which are antiferromagnetically aligned to other similar clusters within the perovskite block layers.

KW - Layered manganese oxide

KW - SrMnO, magnetic structure

KW - SrmnO, neutron diffraction

KW - Strontium manganese oxide

KW - Strontium manganite, oxygen deficient

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