TY - JOUR
T1 - Coupled spin- 12 antiferromagnetic chain Cs2 LiRuCl6 with partially disordered crystal lattice
AU - Watanabe, Kazumitsu
AU - Kurita, Nobuyuki
AU - Tanaka, Hidekazu
AU - Sugiyama, Haruki
AU - Uekusa, Hidehiro
AU - Diaz-Ortega, Ismael F.
AU - Nojiri, Hiroyuki
N1 - Funding Information:
This work was supported by Grants-in-Aid for Scientific Research (A) (Grant No. 17H01142) and (C) (Grant No. 19K03711) from Japan Society for the Promotion of Science. This work was performed under the Inter-University Cooperative Research Program of the Institute for Materials Research, Tohoku University (Proposal No. 19K0068).
Publisher Copyright:
© 2021 American Physical Society.
PY - 2021/2/11
Y1 - 2021/2/11
N2 - We determined the crystal structure of Cs2LiRuCl6, which was synthesized in this work, and investigated its magnetic properties. Cs2LiRuCl6 has a hexagonal structure composed of linear chains of face-sharing RuCl6 and LiCl6 octahedra. In two thirds of the structural chains, Ru3+ and Li+ sites are almost ordered, while in the other chains their sites are disordered. This situation is analogous to the ground state of the antiferromagnetic Ising model on a triangular lattice. Using electron paramagnetic resonance, we evaluated the g factors of Ru3+ with effective spin-12 as gc=2.72 and gab=1.50 for magnetic fields H parallel and perpendicular to the c axis, respectively. Magnetization curves for H∥c and H⊥c are highly anisotropic. However, these magnetization curves approximately coincide when normalized by the g factors. It was found from the magnetization and specific heat results that Cs2LiRuCl6 can be described as a coupled one-dimensional S=1/2 Heisenberg-like antiferromagnet with J/kB≃3.7 K. Three-dimensional ordering occurs at TN=0.48 K. A magnetic phase diagram for H∥c is also presented.
AB - We determined the crystal structure of Cs2LiRuCl6, which was synthesized in this work, and investigated its magnetic properties. Cs2LiRuCl6 has a hexagonal structure composed of linear chains of face-sharing RuCl6 and LiCl6 octahedra. In two thirds of the structural chains, Ru3+ and Li+ sites are almost ordered, while in the other chains their sites are disordered. This situation is analogous to the ground state of the antiferromagnetic Ising model on a triangular lattice. Using electron paramagnetic resonance, we evaluated the g factors of Ru3+ with effective spin-12 as gc=2.72 and gab=1.50 for magnetic fields H parallel and perpendicular to the c axis, respectively. Magnetization curves for H∥c and H⊥c are highly anisotropic. However, these magnetization curves approximately coincide when normalized by the g factors. It was found from the magnetization and specific heat results that Cs2LiRuCl6 can be described as a coupled one-dimensional S=1/2 Heisenberg-like antiferromagnet with J/kB≃3.7 K. Three-dimensional ordering occurs at TN=0.48 K. A magnetic phase diagram for H∥c is also presented.
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U2 - 10.1103/PhysRevB.103.064419
DO - 10.1103/PhysRevB.103.064419
M3 - Article
AN - SCOPUS:85100675643
SN - 2469-9950
VL - 103
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 6
M1 - 064419
ER -