• Onset of itinerant ferromagnetism associated with semiconductor-metal transition in Ti$_{x}$Nb$_{1-x}$CoSn half Heusler solid solution compounds

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      https://www.ias.ac.in/article/fulltext/pram/071/01/0157-0166

    • Keywords

       

      Itinerant ferromagnets; ferromagnetic metal; half Heusler.

    • Abstract

       

      In this paper, the magnetic and transport properties of the Ti$_{x}$Nb$_{1−x}$CoSn solid solution compounds with half Heusler cubic MgAgAs-type structure have been studied. This work shows the onset of ferromagnetism associated with a semiconductor to metal transition. The transition occurs directly from ferromagnetic metal to semiconducting state as it is the case in the TiCo$_{x}$Ni$_{1−x}$Sn series studied previously. A weak quantity of Ti in NbCoSn is sufficient to allow the appearance of ferromagnetic order and metallic state. The variations of the Curie temperature as a function of saturation and effective paramagnetic moments are related to the itinerant ferromagnetism model. A comparison is made with the TiCoSn$_{x}$Sb$_{1−x}$ series (also studied previously), where the transition from TiCoSn ferromagnetic metal to non-magnetic semiconductor TiCoSb occurs through an intermediate metallic Pauli-like state.

    • Author Affiliations

       

      M A Kouacou1 A A Koua2 J T Zoueu1 K Konan1 J Pierre3

      1. Département Génie Electrique et Electronique, Institut National Polytechnique Houphouët-Boigny (INP-HB), BP 1093 Yamoussoukro, Côte d'Ivoire
      2. Laboratoire de Physique Nucléaire et Radioprotection, UFR SSMT, Université de Cocody, 22 BP 582 Abidjan 22, Côte d'Ivoire
      3. Laboratoire de Magnétisme L. Néel, 116X, 38042 Grenoble, France
    • Dates

       
  • Pramana – Journal of Physics | News

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