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.
|Journal||journal of the physical society of japan|
|Publication status||Published - 2010 Jun|
- Transition metal oxide
- Triangular lattice
ASJC Scopus subject areas
- Physics and Astronomy(all)