Structure and magnetism of NaRu2O4 and Na 2.7Ru4O9

K. A. Regan; Q. Huang; M. Lee; A. P. Ramirez; R. J. Cava

doi:10.1016/j.jssc.2005.10.016

Structure and magnetism of NaRu₂O₄ and Na _2.7Ru₄O₉

K. A. Regan, Q. Huang, M. Lee, A. P. Ramirez, R. J. Cava

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The structures of NaRu₂O₄ and Na_2.7Ru ₄O₉ are refined using neutron diffraction. NaRu ₂O₄ is a stoichiometric compound consisting of double chains of edge sharing RuO₆ octahedra. Na_2.7Ru ₄O₉ is a non-stoichiometric compound with partial occupancy of the Na sublattice. The structure is a mixture of single, double and triple chains of edge-shared RuO₆ octahedra. NaRu₂O ₄ displays temperature independent paramagnetism with χ0=1.23×10-4emu/molRuOe. Na_2.7Ru₄O₉ is paramagnetic, χ0=2.0×10-4emu/molOe with Θw=-11.8K and a Curie constant of 0.0119 emu/mol Oe K. Specific heat measurements reveal a small upturn at low temperatures, similar to the upturn observed in La ₄Ru₆O₁₉. The electronic contribution to the specific heat (γ) for Na_2.7Ru₄O₉ was determined to be15 mJ/mole_Ru K².

Original language	English (US)
Pages (from-to)	195-204
Number of pages	10
Journal	Journal of Solid State Chemistry
Volume	179
Issue number	1
DOIs	https://doi.org/10.1016/j.jssc.2005.10.016
State	Published - Jan 2006

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Keywords

Bronze
Ferrite
NaRu O
NaRuO
Paramagnetic
Ruthenate

Access to Document

10.1016/j.jssc.2005.10.016

Cite this

@article{f936682f6dc6445ab9e56370743f4614,

title = "Structure and magnetism of NaRu2O4 and Na 2.7Ru4O9",

abstract = "The structures of NaRu2O4 and Na2.7Ru 4O9 are refined using neutron diffraction. NaRu 2O4 is a stoichiometric compound consisting of double chains of edge sharing RuO6 octahedra. Na2.7Ru 4O9 is a non-stoichiometric compound with partial occupancy of the Na sublattice. The structure is a mixture of single, double and triple chains of edge-shared RuO6 octahedra. NaRu2O 4 displays temperature independent paramagnetism with χ0=1.23×10-4emu/molRuOe. Na2.7Ru4O9 is paramagnetic, χ0=2.0×10-4emu/molOe with Θw=-11.8K and a Curie constant of 0.0119 emu/mol Oe K. Specific heat measurements reveal a small upturn at low temperatures, similar to the upturn observed in La 4Ru6O19. The electronic contribution to the specific heat (γ) for Na2.7Ru4O9 was determined to be15 mJ/moleRu K2.",

keywords = "Bronze, Ferrite, NaRu O, NaRuO, Paramagnetic, Ruthenate",

author = "Regan, {K. A.} and Q. Huang and M. Lee and Ramirez, {A. P.} and Cava, {R. J.}",

note = "Funding Information: The work at the Princeton University was supported by the National Science Foundation, Grant DMR-0244254. ",

year = "2006",

month = jan,

doi = "10.1016/j.jssc.2005.10.016",

language = "English (US)",

volume = "179",

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journal = "Journal of Solid State Chemistry",

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T1 - Structure and magnetism of NaRu2O4 and Na 2.7Ru4O9

AU - Regan, K. A.

AU - Huang, Q.

AU - Lee, M.

AU - Ramirez, A. P.

AU - Cava, R. J.

N1 - Funding Information: The work at the Princeton University was supported by the National Science Foundation, Grant DMR-0244254.

PY - 2006/1

Y1 - 2006/1

N2 - The structures of NaRu2O4 and Na2.7Ru 4O9 are refined using neutron diffraction. NaRu 2O4 is a stoichiometric compound consisting of double chains of edge sharing RuO6 octahedra. Na2.7Ru 4O9 is a non-stoichiometric compound with partial occupancy of the Na sublattice. The structure is a mixture of single, double and triple chains of edge-shared RuO6 octahedra. NaRu2O 4 displays temperature independent paramagnetism with χ0=1.23×10-4emu/molRuOe. Na2.7Ru4O9 is paramagnetic, χ0=2.0×10-4emu/molOe with Θw=-11.8K and a Curie constant of 0.0119 emu/mol Oe K. Specific heat measurements reveal a small upturn at low temperatures, similar to the upturn observed in La 4Ru6O19. The electronic contribution to the specific heat (γ) for Na2.7Ru4O9 was determined to be15 mJ/moleRu K2.

AB - The structures of NaRu2O4 and Na2.7Ru 4O9 are refined using neutron diffraction. NaRu 2O4 is a stoichiometric compound consisting of double chains of edge sharing RuO6 octahedra. Na2.7Ru 4O9 is a non-stoichiometric compound with partial occupancy of the Na sublattice. The structure is a mixture of single, double and triple chains of edge-shared RuO6 octahedra. NaRu2O 4 displays temperature independent paramagnetism with χ0=1.23×10-4emu/molRuOe. Na2.7Ru4O9 is paramagnetic, χ0=2.0×10-4emu/molOe with Θw=-11.8K and a Curie constant of 0.0119 emu/mol Oe K. Specific heat measurements reveal a small upturn at low temperatures, similar to the upturn observed in La 4Ru6O19. The electronic contribution to the specific heat (γ) for Na2.7Ru4O9 was determined to be15 mJ/moleRu K2.

KW - Bronze

KW - Ferrite

KW - NaRu O

KW - NaRuO

KW - Paramagnetic

KW - Ruthenate

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