Negative magnetoresistance and s-f scattering in Pb$_{1-x}$Eu$_{x}$Se

ORAL

Abstract

PbSe is cost effective over PbTe and has been a good potential p-type thermoelectric material, showing zT $>$1.\footnote{Yeseul Lee et al., J. Am. Chem. Soc. 135, 2013, 5152-5160.} Also, addition of Eu increases the band gap.\footnote{Arnim Lambrecht et al., J. Cryst. Growth 108, 1991, 301-308.} The valence band of Pb$_{1-x}$Eu$_{x}$Se appears theoretically favorable generating degeneracy between L-points and $\Sigma$-points. Here, we synthesize and characterize p-type doped Pb$_{1-x}$Eu$_{x}$Se:Na using combination of co-melting and Spark Plasma Sintering methods. Thermoelectric, thermomagnetic, and galvanomagnetic properties (electrical resistivity, Seebeck, and Hall) are measured and reported, along with Magnetization and Magnetoresistance. We found out that magnetic scattering is dominant in Pb$_{1-x}$Eu$_{x}$Se, showing negative magnetoresistance.

*This work was supported as part of the ``Revolutionary Materials for Solid State Energy Conversion (RMSSEC),'' an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science.

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Authors

  • Sunphil Kim

    • Department of Mechanical and Aerospace Engineering, Ohio State University, Columbus, OH

  • Yibin Gao

    • Department of Mechanical and Aerospace Engineering, Ohio State University, Columbus, OH

  • Bin He

    • Department of Mechanical and Aerospace Engineering, Ohio State University, Columbus, OH

  • Gloria Lehr

    • Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI

  • Yeseul Lee

    • Department of Chemistry, Northwestern University, Evanston, IL

  • Mercouri Kanatzidis

    • Department of Chemistry, Northwestern University, Evanston, IL

  • Donald Morelli

    • Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI

  • Joseph P. Heremans

    • Department of Mechanical and Aerospace Engineering, Deaprtment of Physics, Ohio State University, Columbus, OH