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Negative magnetoresistance in Ba2CoS3.

Thomas Baikie1, Vincent Hardy, Antoine Maignan

  • 1Department of Chemistry, University of Hull, Cottingham Road, Hull, UK.

Chemical Communications (Cambridge, England)
|October 13, 2005
PubMed
Summary

Researchers discovered negative magnetoresistance and metallic behavior in a novel one-dimensional cobalt-containing sulfide. This finding is the first of its kind for this material class.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Solid-State Chemistry

Background:

  • One-dimensional (1D) materials exhibit unique electronic and magnetic properties.
  • Cobalt (Co2+)-containing compounds are of interest for their magnetic and conductive characteristics.

Purpose of the Study:

  • To investigate the electronic and magnetic properties of a novel one-dimensional sulfide containing cobalt.
  • To determine if this material exhibits magnetoresistance or metallic behavior.

Main Methods:

  • Synthesis of a one-dimensional sulfide material incorporating Co2+ ions.
  • Electrical transport measurements, including resistance as a function of temperature and magnetic field.

Main Results:

  • Observation of a small negative magnetoresistance effect.
  • Detection of metallic-like behavior, indicated by a positive temperature coefficient of resistance.

Conclusions:

  • The synthesized 1D sulfide containing Co2+ is the first material of its kind to show negative magnetoresistance.
  • The observed metallic-like behavior suggests potential applications in electronic devices.

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