BaSn{sub 6}Co{sub 6}O{sub 19}-A novel frustrated antiferromagnet with the magnetoplumbite type structure
- Institut fuer Anorganische Chemie, Pfaffenwaldring 55, 70569 Stuttgart (Germany)
Single crystals of the novel compound BaSn{sub 6}Co{sub 6}O{sub 19} with maximum width 1 mm and thickness around 0.05 mm were grown from a barium chloride flux. The composition was determined from refinements of single crystal X-ray diffraction data and microprobe analysis. BaSn{sub 6}Co{sub 6}O{sub 19} crystallizes in the magnetoplumbite type structure (hexagonal, space group P6{sub 3}/mmc, a=6.0940(1) A, c=23.9633(5) A, V=770.69 A{sup 3}, Z=2). A significant disorder is generated by random occupation of two octahedrally coordinated crystallographic sites with Co{sup 2+} and Sn{sup 4+} ions, while further sites are exclusively occupied by either Co{sup 2+} (tetrahedrally coordinated) or Sn{sup 4+} (octahedrally coordinated). One site with mixed occupation realizes the topology of a kagome net. The temperature dependence of the magnetic susceptibility for a single crystal BaSn{sub 6}Co{sub 6}O{sub 19} reveals a low temperature antiferromagnetic order at T{sub N}=14 K. A relatively large value of frustration factor f{sub ||=}|{Theta}{sub W||}|/T{sub N} Almost-Equal-To 26 and f{sub Up-Tack }=|{Theta}{sub W Up-Tack }|/T{sub N} Almost-Equal-To 12 implies a frustrated antiferromagnetism. - Graphical abstract: Single crystals of novel magnetoplumbite BaSn{sub 6}Co{sub 6}O{sub 19} have been characterized. Highlights: Black-Right-Pointing-Pointer A novel compound magnetoplumbite BaSn{sub 6}Co{sub 6}O{sub 11} is synthesized in single crystalline form. Black-Right-Pointing-Pointer It contains structural subunits with kagome topology, sandwiched between spinel blocks. Black-Right-Pointing-Pointer Structural disorder in both subunits by random replacement of magnetic Co{sup 2+} with nonmagnetic Sn{sup 4+}. Black-Right-Pointing-Pointer Bulk magnetic measurements indicate long-range antiferromagnetic order below 14 K. Black-Right-Pointing-Pointer The anisotropic frustration factor indicates strongly frustrated antiferromagnetism.
- OSTI ID:
- 21612809
- Journal Information:
- Journal of Solid State Chemistry, Vol. 184, Issue 12; Other Information: DOI: 10.1016/j.jssc.2011.09.028; PII: S0022-4596(11)00521-4; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANISOTROPY
ANTIFERROMAGNETISM
BARIUM CHLORIDES
COBALT IONS
CRYSTALLOGRAPHY
HCP LATTICES
MAGNETIC SUSCEPTIBILITY
MONOCRYSTALS
SPACE GROUPS
SPINELS
TEMPERATURE DEPENDENCE
THICKNESS
TOPOLOGY
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM HALIDES
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
DIMENSIONS
HALIDES
HALOGEN COMPOUNDS
HEXAGONAL LATTICES
IONS
MAGNETIC PROPERTIES
MAGNETISM
MATHEMATICS
MINERALS
OXIDE MINERALS
PHYSICAL PROPERTIES
SCATTERING
SYMMETRY GROUPS