Magnetic and structural transitions tuned by non-magnetic Ti doping in Ca3Ru2O7

ORAL

Abstract

We report the effect of Ti doping on the structural and magnetic transitions in the bilayer Ruthenate Ca3Ru2O7. Ca3Ru2O7 orders antiferromagnetically at 56 K followed by a simultaneous structural and metal-insulator transition at 48 K [1]. Ti doping in Ca3Ru2O7 causes dramatic changes in both antiferromagnetic and structural transitions. With the Ti doping concentration above 5\%, both transitions move to much higher temperature and merge, e.g. TN~85 K for 5\% Ti, 113 K for 10\% Ti. For the latter sample, the structural parameters change much more remarkably through the transition compared to Ca3Ru2O7 [2]. Such structural and magnetic transitions tuned by Ti-doping highlight the strong spin-lattice coupling in Ca3Ru2O7. Neutron scattering measurement on these samples will also be discussed. \\[4pt] [1] Cao G et al; PRB 78, 1751 (1997)\\[0pt] [2] Yoshida Y et al; PRB 72, 054412 (2005)

–

Authors

  • Jin Peng

    • Department of Physics and Engineering Physics, Tulane University, New Orleans

  • Gaochao Wang

    • Department of Physics and Engineering Physics, Tulane University, New Orleans

  • Leonard Spinu

    • Advanced Material Research Institute and Physics Department, University of New Orleans, LA

  • Xianglin Ke

    • Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, TN

  • Tao Hong

    • Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, TN

  • Zhiqiang Mao

    • Dept. of Physics, Tulane Univ.
    • Department of Physics, Tulane University
    • Department of Physics and Engineering Physics, Tulane University, New Orleans, LA 70118
    • Department of Physics and Engineering Physics, Tulane University, New Orleans
    • Department of Physics and Engineering Physics, Tulane University