Structural, Magnetic and Electronic Transport Properties of Novel Hollandite-Type Molybdenum Oxide, Rb1.5Mo8O16
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- Ozawa Takashi
- Department of Physics, Chuo University
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- Suzuki Isao
- Department of Physics, Chuo University
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- Sato Hirohiko
- Department of Physics, Chuo University
Bibliographic Information
- Other Title
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- Structural, Magnetic and Electronic Transport Properties of Novel Hollandite-Type Molybdenum Oxide, Rb<sub>1.5</sub>Mo<sub>8</sub>O<sub>16</sub>
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Abstract
Structural, magnetic, and transport properties of a novel hollandite-type molybdenum oxide, Rb1.5Mo8O16 have been investigated. Whereas a typical hollandite structure is characterized by uniform zigzag ladder chains of edge-shared MO6 (M=transition metal) octahedra, the zigzag ladders in Rb1.5Mo8O16 are strongly distorted, and consequently, “Mo4” clusters composed of four edge-shared MoO6 octahedra are formed. A semiquantitative band calculation based on an extended Hückel method shows that the band structure assumes the characteristics of the molecular orbitals of an isolated Mo4 cluster. The magnetic susceptibility reveals the existence of spins spread over each Mo4 cluster rather than localized on each Mo atom. The electrical resistivity and the thermoelectric power indicate that the electric conduction is governed by cluster-to-cluster electron hopping. Rb1.5Mo8O16 undergoes a phase transtion at T1=208 K, accompanied by a change in the number of spins and carriers. X-ray diffractions at low temperatures detected a slight breakdown of the tetragonal symmetry below T1. The transport and the magnetic properties of related compounds, K2Mo8O16 and Ba1.14Mo8O16 are also reported.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 75 (1), 014802-, 2006
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390001204189895424
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- NII Article ID
- 110003482845
- 210000105971
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- NII Book ID
- AA00704814
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- BIBCODE
- 2006JPSJ...75a4802O
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 7772331
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed