Multiferroic properties in the spin-frustrated Cu$_2$Te$_2$O$_5$X$_2$ (X $=$ Cl and Br)

POSTER

Abstract

The geometrically frustrated spin-tetrahedral systems Cu$_{2}$Te$_{2}$O$_{5}$X$_{2}$ (X $=$ Cl and Br) have been studied using magnetization, dielectric constant and temperature-dependent x-ray diffraction. It was found that a antiferromagnetic ordering and a step-jump in polarization are observed at T$=$18.5 K for X$=$Cl and T$=$11.5 K for X$=$Br, respectively. The multiferroic properties for Cu$_{2}$Te$_{2}$O$_{5}$X$_{2}$(X $=$ Cl and Br) are discussed.

Authors

  • Yu-Kuan Yang

    • Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan

  • Chin-Chia Yeh

    • Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan

  • Yi-Bin Jin

    • Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan

  • Sudip Mukherjee

    • Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan

  • Helmuth Berger

    • Institutes of Physics of Complex Matter, Ecole Polytechnique Federale de Lausanne(EPFL),CH-1015 Lausanne,Switzerland
    • Institutes of Physics of Complex Matter, EPFL 1015, Lausanne, Swizerland
    • Institute of Condensed Matter Physics, EPFL, Lausanne, Switzerland

  • Hung-Duen Yang

    • Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan