Anomalous electrical and magnetic behavior in (PO2)4(WO3)2m (m=4)

Z. S. Teweldemedhin, Kandalam Ramanujachary, M. Greenblatt

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Single crystals of P4W8O32 {(PO2)4(WO3)2m, m=4} were prepared by chemical-vapor transport technique with KI as the transport agent. The temperature dependence of electrical resistivity in the range 2300 K shows metallic behavior with two anomalies at 60 and 85 K. The room-temperature resistivities along the long- and short-plate axis of a single crystal (a and b axes) are 3×10-4 and 2×10-4 cm while that perpendicular to the crystal plate (c axis) is 7×10-3 cm. The relatively higher conductivities in the crystallographic a-b plane confirm that the compound is a quasi-two-dimensional metal. Seebeck measurement indicates that at room temperature the primary charge carriers are electrons. The magnetic susceptibility is temperature independent down to 92 K. At 92 and 56 K sharp decreases in the susceptibility are observed. The anomalous behavior in the magnetic susceptibility and electrical resistivity of P4W8O32 at low temperatures is indicative of the onset of charge-density-wave states and is consistent with the proposed band electronic structure.

Original languageEnglish (US)
Pages (from-to)7897-7900
Number of pages4
JournalPhysical Review B
Issue number12
StatePublished - Jan 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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