Long-range order and spin-liquid states of polycrystalline Tb 2+xTi2-xO7+y

T. Taniguchi, H. Kadowaki, H. Takatsu, B. Fåk, J. Ollivier, Teruo Yamazaki, T. J. Sato, H. Yoshizawa, Y. Shimura, T. Sakakibara, T. Hong, K. Goto, L. R. Yaraskavitch, J. B. Kycia

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Abstract

Low-temperature states of polycrystalline samples of a frustrated pyrochlore oxide Tb2+xTi2-xO7+y have been investigated by specific heat, magnetic susceptibility, and neutron scattering experiments. We have found that this system can be tuned by a minute change of x from a spin-liquid state (x<xc) to a partly ordered state with a small antiferromagnetic ordering of the order of 0.1μB. Specific heat shows a sharp peak at a phase transition at Tc=0.5 K for x=0.005. Magnetic excitation spectra for this sample change from a quasielastic to a gapped type through Tc. The possibility of a Jahn-Teller transition is discussed.

Original languageEnglish
Article number060408
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number6
DOIs
Publication statusPublished - 2013 Feb 25
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Taniguchi, T., Kadowaki, H., Takatsu, H., Fåk, B., Ollivier, J., Yamazaki, T., Sato, T. J., Yoshizawa, H., Shimura, Y., Sakakibara, T., Hong, T., Goto, K., Yaraskavitch, L. R., & Kycia, J. B. (2013). Long-range order and spin-liquid states of polycrystalline Tb 2+xTi2-xO7+y Physical Review B - Condensed Matter and Materials Physics, 87(6), [060408]. https://doi.org/10.1103/PhysRevB.87.060408