Metal-insulator transitions in reduced molybdenum oxides Sm4Mo18O32 and Nd4Mo18O32

S. E. Lofland; S. Tyagi; J. D. Hettinger; W. H. McCarroll; K. V. Ramanujachary; P. Gall; P. Gougeon

doi:10.1016/j.materresbull.2006.10.018

Metal-insulator transitions in reduced molybdenum oxides Sm₄Mo₁₈O₃₂ and Nd₄Mo₁₈O₃₂

S. E. Lofland, S. Tyagi, J. D. Hettinger, W. H. McCarroll, K. V. Ramanujachary, P. Gall, P. Gougeon

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2 Scopus citations

Abstract

Synthesis, structure and electronic properties are reported on single crystals of Sm₄Mo₁₈O₃₂ and Nd₄Mo₁₈O₃₂. The triclinic crystal structure has three distinctly different Mo metal atom clusters (Mo₂, Mo₄ and Mo₆), which extend in complex chains. The temperature dependence of the electrical resistivity displays a broad minimum around 150-200 K with a pronounced increase in the 30-50 K range. However, unlike the related monoclinic reduced Mo oxides, A₄Mo₁₈O₃₂ (A = Y, Gd-Yb), there is no true metal-insulator transition in the Sm and Nd analogs. We discuss these observations in terms of correlations among the Mo clusters.

Original language	English (US)
Pages (from-to)	1230-1241
Number of pages	12
Journal	Materials Research Bulletin
Volume	42
Issue number	7
DOIs	https://doi.org/10.1016/j.materresbull.2006.10.018
State	Published - Jul 3 2007

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.materresbull.2006.10.018

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@article{36ebf6becabb4182a7558244c885716b,

title = "Metal-insulator transitions in reduced molybdenum oxides Sm4Mo18O32 and Nd4Mo18O32",

abstract = "Synthesis, structure and electronic properties are reported on single crystals of Sm4Mo18O32 and Nd4Mo18O32. The triclinic crystal structure has three distinctly different Mo metal atom clusters (Mo2, Mo4 and Mo6), which extend in complex chains. The temperature dependence of the electrical resistivity displays a broad minimum around 150-200 K with a pronounced increase in the 30-50 K range. However, unlike the related monoclinic reduced Mo oxides, A4Mo18O32 (A = Y, Gd-Yb), there is no true metal-insulator transition in the Sm and Nd analogs. We discuss these observations in terms of correlations among the Mo clusters.",

author = "Lofland, {S. E.} and S. Tyagi and Hettinger, {J. D.} and McCarroll, {W. H.} and Ramanujachary, {K. V.} and P. Gall and P. Gougeon",

note = "Funding Information: SEL acknowledges support from NSF MRSEC DMR 0520471 and DMR 0603644. KVR acknowledges the support from Rowan University in the form of adjusted load for carrying out portions of this research.",

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doi = "10.1016/j.materresbull.2006.10.018",

language = "English (US)",

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journal = "Materials Research Bulletin",

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TY - JOUR

T1 - Metal-insulator transitions in reduced molybdenum oxides Sm4Mo18O32 and Nd4Mo18O32

AU - Lofland, S. E.

AU - Tyagi, S.

AU - Hettinger, J. D.

AU - McCarroll, W. H.

AU - Ramanujachary, K. V.

AU - Gall, P.

AU - Gougeon, P.

N1 - Funding Information: SEL acknowledges support from NSF MRSEC DMR 0520471 and DMR 0603644. KVR acknowledges the support from Rowan University in the form of adjusted load for carrying out portions of this research.

PY - 2007/7/3

Y1 - 2007/7/3

N2 - Synthesis, structure and electronic properties are reported on single crystals of Sm4Mo18O32 and Nd4Mo18O32. The triclinic crystal structure has three distinctly different Mo metal atom clusters (Mo2, Mo4 and Mo6), which extend in complex chains. The temperature dependence of the electrical resistivity displays a broad minimum around 150-200 K with a pronounced increase in the 30-50 K range. However, unlike the related monoclinic reduced Mo oxides, A4Mo18O32 (A = Y, Gd-Yb), there is no true metal-insulator transition in the Sm and Nd analogs. We discuss these observations in terms of correlations among the Mo clusters.

AB - Synthesis, structure and electronic properties are reported on single crystals of Sm4Mo18O32 and Nd4Mo18O32. The triclinic crystal structure has three distinctly different Mo metal atom clusters (Mo2, Mo4 and Mo6), which extend in complex chains. The temperature dependence of the electrical resistivity displays a broad minimum around 150-200 K with a pronounced increase in the 30-50 K range. However, unlike the related monoclinic reduced Mo oxides, A4Mo18O32 (A = Y, Gd-Yb), there is no true metal-insulator transition in the Sm and Nd analogs. We discuss these observations in terms of correlations among the Mo clusters.

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DO - 10.1016/j.materresbull.2006.10.018

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Metal-insulator transitions in reduced molybdenum oxides Sm₄Mo₁₈O₃₂ and Nd₄Mo₁₈O₃₂

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