Physical Properties of CaFe$_{4}$As$_{3}$ Single Crystals

ORAL

Abstract

New compound CaFe$_{4}$As$_{3}$ crystallizes in an orthorhombic structure with Fe$_{2}$As$_{2}$ layers aligned along $b$ direction but a rectangular cross-section in \textit{ac} plane. The needle-shaped CaFe$_{4}$As$_{3}$ single crystals were grown and are found to undergo two successive phase transitions occurring at T$_{1} \sim $ 90 K and T$_{2} \sim $ 27 K, respectively. At T$_{1}$ the electrical resistivity increases and magnetic susceptibility decreases in both parallel and perpendicular to $b$ directions consistent with the scenario of spin-density-wave formation. At T$_{2}$, resistivity decreases sharply at T$_{2}$ with hysteresis while magnetic susceptibility increases along either $b$ direction or \textit{ac} plane. The underlying physics will be discussed by taking into account other physical properties.

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Authors

  • Amar Karki

    Louisiana State University, USA, Louisiana State University

  • Yimin Xiong

    Louisiana State University, USA, Louisiana State University

  • Jianneng Li

    Louisiana State University

  • Shane Stadler

    Department of Physics and Astronomy, Louisiana State University, Louisiana State University, USA, Louisiana State University

  • Gregory McCandless

    Department of Chemistry, Louisiana State University, Louisiana State University

  • Julia Chan

    Louisiana State University, USA, Louisiana State University

  • Rongying Jin

    Louisiana State University, Louisiana State University, Baton Rouge, LA 70803, USA, Department of Physics and Astronomy, Louisiana State University, Louisiana State University, Baton Rouge LA, Louisiana State University, USA, Dept. of Physics, Louisiana State University, Baton Rouge, LA 70802, USA