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      https://www.ias.ac.in/article/fulltext/pram/058/05-06/1101-1104

    • Keywords

       

      Intermetallic compounds; magnetic ordering; electrical resistivity; thermoelectric power

    • Abstract

       

      New R2Ti3Ge4 (R=Dy, Ho and Er) intermetallic compounds have been synthesized and characterized by X-ray diffraction and low temperature ac magnetic susceptibility, electrical resistivity and thermoelectric power measurements were carried out. The compounds crystallize in the parent, Sm5Ge4-type orthorhombic structure (space group Pnma) and lanthanide contraction is observed as one moves along the rare-earth series. The changeover from paramagnetic to antiferromagnetic phase happens at low temperatures and the ordering temperature scales with the de Gennes factor. The electrical resistivity is metallic with a negative curvature above 100 K. Thermopower displays a weak maximum at temperatures less than 50 K signifying the possible phonon and magnon drag effects.

    • Author Affiliations

       

      R Nirmala1 V Sankaranarayanan1 K Sethupathi1 AV Morozkin2 T Geethakumary3 Y Hariharan3

      1. Department of Physics, Indian Institute of Technology, Chennai - 600 036, India
      2. Chemical Faculty, Moscow Lomonosov State University, Moscow, Russia
      3. Material Sciences Division, Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, India
    • Dates

       
  • Pramana – Journal of Physics | News

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