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Transport and Magnetic Properties of Magnéli Phase Tungsten Oxide WO2.90 Prepared by Spark Plasma Sintering.

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Title: Transport and Magnetic Properties of Magnéli Phase Tungsten Oxide WO2.90 Prepared by Spark Plasma Sintering.
Authors: Dadiani, T.1 (AUTHOR), Tchabukiani, T.1 (AUTHOR), Jishiashvili, D.2,3 (AUTHOR), Daraselia, D.1 (AUTHOR), Japaridze, D.1 (AUTHOR), La Mattina, F.4 (AUTHOR), Shengelaya, A.1,2 (AUTHOR) alexander.shengelaya@tsu.ge
Source: Journal of Superconductivity & Novel Magnetism. Feb2025, Vol. 38 Issue 1, p1-7. 7p.
Abstract: The transport and magnetic properties of the Magnéli phase tungsten oxide WO2.90, prepared via spark plasma sintering, were investigated across a broad temperature range of 4–550 K, including the previously unexplored low-temperature region below 300 K. Microstructure analysis shows that obtained pellets are fully dense, enabling reliable measurement of transport properties. Resistivity measurements reveal typical metallic behavior of WO2.90 at low temperatures. Above room temperature, resistivity tends to saturate by reaching a maximum value near 430 K. The resistivity saturation indicates that Mott-Ioffe-Regel limit is approached, where the charge carrier mean free path becomes comparable to the interatomic spacing. The temperature dependence of the resistivity can be well described by the phenomenological parallel resistor model. Significant positive magnetoresistance was observed at low temperatures, with an unusual linear dependence on the magnetic field. Despite its metallic conductivity, WO2.90 displays weak diamagnetism, likely due to the substantial core diamagnetism of tungsten and the bipolaronic pairing of charge carriers. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Superconductivity & Novel Magnetism is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Transport and Magnetic Properties of Magnéli Phase Tungsten Oxide WO<subscript>2.90</subscript> Prepared by Spark Plasma Sintering.
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  Data: <searchLink fieldCode="AR" term="%22Dadiani%2C+T%2E%22">Dadiani, T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tchabukiani%2C+T%2E%22">Tchabukiani, T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jishiashvili%2C+D%2E%22">Jishiashvili, D.</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Daraselia%2C+D%2E%22">Daraselia, D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Japaridze%2C+D%2E%22">Japaridze, D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22La+Mattina%2C+F%2E%22">La Mattina, F.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shengelaya%2C+A%2E%22">Shengelaya, A.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> alexander.shengelaya@tsu.ge</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Superconductivity+%26+Novel+Magnetism%22">Journal of Superconductivity & Novel Magnetism</searchLink>. Feb2025, Vol. 38 Issue 1, p1-7. 7p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The transport and magnetic properties of the Magnéli phase tungsten oxide WO2.90, prepared via spark plasma sintering, were investigated across a broad temperature range of 4–550 K, including the previously unexplored low-temperature region below 300 K. Microstructure analysis shows that obtained pellets are fully dense, enabling reliable measurement of transport properties. Resistivity measurements reveal typical metallic behavior of WO2.90 at low temperatures. Above room temperature, resistivity tends to saturate by reaching a maximum value near 430 K. The resistivity saturation indicates that Mott-Ioffe-Regel limit is approached, where the charge carrier mean free path becomes comparable to the interatomic spacing. The temperature dependence of the resistivity can be well described by the phenomenological parallel resistor model. Significant positive magnetoresistance was observed at low temperatures, with an unusual linear dependence on the magnetic field. Despite its metallic conductivity, WO2.90 displays weak diamagnetism, likely due to the substantial core diamagnetism of tungsten and the bipolaronic pairing of charge carriers. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Superconductivity & Novel Magnetism is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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              Text: Feb2025
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