Li7RuO6: As a 4d Heisenberg frustrated magnet

Kanako Nakajima, Hirohiko Sato, Tomoya Fukui, Masahiro Iwaki, Yasuo Narumi, Koichi Kindo, Yutaka Itoh, Chishiro Michioka, Kazuyoshi Yoshimura

Research output: Contribution to journalArticlepeer-review

Abstract

The structural and magnetic properties of Li7RuO6 were investigated in single crystals. This ruthenate is composed of quasi-two-dimensional distorted triangular lattices of RuO6 octahedra isolated from each other. Because of the (t2g)3 electron con.guration of Ru5+, a Heisenberg-type magnetic behavior of S = 3/2 spins is expected. The magnetic susceptibility reveals an antiferromagnetic transition at TN = 6:5 K, much lower than the absolute value of the Weiss temperature Θ =-75 K, indicating a strong geometric frustration. The small and almost isotropic drop of the susceptibility below TN suggests a helical magnetic structure. Specific heat revealed an additional phase transition at T'N = 12 K, suggesting an unconventional magnetic phase diagram.

Original languageEnglish
Article number064705
Journaljournal of the physical society of japan
Volume79
Issue number6
DOIs
Publication statusPublished - 2010 Jun

Keywords

  • Frustration
  • Magnetism
  • Ruthenate
  • Transition metal oxide
  • Triangular lattice
  • Two-dimensional

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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