Synthesis and magnetic properties of 12L-perovskites Ba{sub 4}LnIr{sub 3}O{sub 12} (Ln=lanthanides)

Journal Article · Thu Oct 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.07.056· OSTI ID:21372360

Shimoda, Yuki; Doi, Yoshihiro; Wakeshima, Makoto ^[1]; Hinatsu, Yukio ^[1]

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1. Division of Chemistry, Hokkaido University, Sapporo 060-0810 (Japan)

New quadruple perovskite oxides Ba{sub 4}LnIr{sub 3}O{sub 12} (Ln=lanthanides) were prepared and their magnetic properties were investigated. They crystallize in the monoclinic 12L-perovskite-type structure with space group C2/m. The Ir{sub 3}O{sub 12} trimers and LnO{sub 6} octahedra are alternately linked by corner-sharing and form the perovskite-type structure with 12 layers. The Ln and Ir ions are both in the tetravalent state for Ln=Ce, Pr, and Tb compounds (Ba{sub 4}Ln{sup 4+}Ir{sub 3}{sup 4+}O{sub 12}), and for other compounds (Ln=La, Nd, Sm-Gd, Dy-Lu), Ln ions are in the trivalent state and the mean oxidation state of Ir ions is +4.33(Ba{sub 4}Ln{sup 3+}Ir{sub 3}{sup 4+.33}O{sub 12}). An antiferromagnetic transition has been observed for Ln=Ce, Pr, and Tb compounds at 10.5, 35, and 16 K, respectively, while the other compounds are paramagnetic down to 1.8 K. - Graphical abstract: New quadruple perovskite oxides Ba{sub 4}LnIr{sub 3}O{sub 12} were prepared and they form the perovskite-type structure with 12 layers, in which Ir{sub 3}O{sub 12} trimers and LnO{sub 6} octahedra are alternately linked by corner-sharing. For Ln=Ce, Pr, and Tb compounds, an antiferromagnetic transition was observed at 10.5, 35, and 16 K, respectively.

• OSTI ID: 21372360
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 10; Other Information: DOI: 10.1016/j.jssc.2009.07.056; PII: S0022-4596(09)00373-9; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
IRIDIUM COMPOUNDS
IRIDIUM IONS
MAGNETIC SUSCEPTIBILITY
MONOCLINIC LATTICES
OXIDES
PARAMAGNETISM
PEROVSKITE
RARE EARTH COMPOUNDS
SPACE GROUPS
SPECIFIC HEAT
SYNTHESIS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
IONS
MAGNETIC PROPERTIES
MAGNETISM
MINERALS
OXIDE MINERALS
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SYMMETRY GROUPS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS