Thermophysical and thermomagnetic properties of Heusler compound Ni$_{45}$Co$_{5}$Mn$_{37}$In$_{13}$

ORAL

Abstract

Ni$_{45}$Co$_{5}$Mn$_{37}$In$_{13}$ is a Heusler compound that develops a predominant ferromagnetic magnetic moment at temperatures in excess of 270 K, similar to Mn$_{2}$PtGa. Upon cooling Mn$_{2}$PtGa undergoes a paramagnetic-to-ferrimagnetic transition at 230 K, followed by a sharp drop in magnetization at 150 K due to a first-order ferrimagnet-to-antiferromagnetic transition. By analogy, the moment change observed in Ni$_{45}$Co$_{5}$Mn$_{37}$In$_{13}$ at 270 K is due to a first-order magneto-structural transition, where the sample undergoes a predominant ferromagnetic to an antiferromagnetic phase transition, accompanied by a structural phase transition. Experimental data will be given for the heat capacity and heat of magnetization of Ni$_{45}$Co$_{5}$Mn$_{37}$In$_{13}$, as a function of temperature and magnetic field. Thermomagnetic tensor elements will also be reported though the phase transition, i.e. thermal conductivity, thermopower, longitudinal and transverse magnetothermopower or Nernst effect, as a function of magnetic field and temperature. \\[4pt] [1] A. K. Nayak {\&} al., Phys. Rev. Lett. \textbf{110}, 127204 (2013)

Authors

  • Joseph P. Heremans

    Department of Mechanical and Aerospace Engineering and Department of Physics, The Ohio State University, Columbus, Ohio, USA, Department of Physics and Department of Mechanical and Aerospace Engineering, Ohio State University - Columbus, Ohio 43210, USA

  • Sarah J. Watzman

    Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, Ohio, USA, Department of Mechanical and Aerospace Engineering, Ohio State University - Columbus, Ohio 43210, USA

  • Ajaya K. Nayak

    Max Planck Institute for Chemical Physics of Solids, N\"othnitzer Strasse 40, D-01187 Dresden, Germany

  • C. Felser

    Max Planck Institute for Chemical Physics of Solids Dresden, Max Plack Institute for Chemical Physics of Solids, Max Planck Institute for Chemical Physics of Solids, N\"othnitzer Strasse 40, D-01187 Dresden, Germany, MPI for Chemical Physics of Solids, Dresden, Germany