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Unconventional magnetism in the 4d$^{4}$ based ($S=1$) honeycomb system Ag$ {3}$LiRu$ {2}$O$ {6}$ by Kumar, R.; Dey, Tusharkanti; Ette, P. M.; Ramesha, K.; Chakraborty, Atasi; Dasgupta, I.; Orain, J. C.; Baines, C.; Tóth, Sándor; Shahee, A.; Kundu, S.; Prinz-Zwick, M.; Gippius, A. A.; Büttgen, N.; Gegenwart, P.; Mahajan, A. V. is a scholarly article available to read on EtoBox.

What is Unconventional magnetism in the 4d$^{4}$ based ($S=1$) honeycomb system Ag$ {3}$LiRu$ {2}$O$ {6}$ about?

We have investigated the thermodynamic and local magnetic properties of the Mott insulating system Ag$_{3}$LiRu$_{2}$O$_{6}$ containing Ru$^{4+}$ (4$d$$^{4}$) for novel magnetism. The material crystallizes in a monoclinic $C2/m$ structure with RuO$_{6}$ octahedra forming an edge-shared two-dimensional honeycomb lattice with limited stacking order along the $c$-direction. The large negative Curie-Weiss temperature ($\theta_{CW}$ = -57 K) suggests antiferromagnetic interactions among Ru$^{4+}$ ions though magnetic susceptibility and heat capacity show no indication of magnetic long-range order down to 1.8 K and 0.4 K, respectively. $^{7}$Li nuclear magnetic resonance (NMR) shift follows the bulk susceptibility between 120-300 K and levels off below 120 K. Together with a power-law behavior in the temperature dependent spin-lattice relaxation rate between 0.2 and 2 K, it suggest dynamic spin correlations with gapless excitations. Electronic structure calculations suggest an $S = 1$ description of the Ru-moments and the possible importance of further neighbour interactions as also bi-quadratic and ring-exchange terms in determining the magnetic properties. Analysis of our $\mu$SR data

Author

Kumar, R.; Dey, Tusharkanti; Ette, P. M.; Ramesha, K.; Chakraborty, Atasi; Dasgupta, I.; Orain, J. C.; Baines, C.; Tóth, Sándor; Shahee, A.; Kundu, S.; Prinz-Zwick, M.; Gippius, A. A.; Büttgen, N.; Gegenwart, P.; Mahajan, A. V.

Published

2019

Language

EN