Anisotropic Ru3+ 4d5 magnetism in the α-RuCl3 honeycomb system: Susceptibility, specific heat, and zero-field NMR
作者： M. Majumder , M. Schmidt , H. Rosner , A. A. Tsirlin , H. Yasuoka
DOI: 10.1103/PHYSREVB.91.180401
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摘要: Hexagonal $\ensuremath{\alpha}$-Ru trichloride single crystals exhibit a strong magnetic anisotropy and we show that upon applying fields up to 14 T in the honeycomb plane successive order at ${T}_{1}=14\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ ${T}_{2}=8\phantom{\rule{0.28em}{0ex}}\mathrm{K}$ could be completely suppressed, whereas perpendicular direction is robust. Furthermore, field dependence of $\ensuremath{\chi}(\mathrm{T})$ implies coexisting ferro- antiferromagnetic exchange between in-plane components ${\text{Ru}}^{3+}$ spins, for out-of-plane becomes evident. $^{101}\mathrm{Ru}$ zero-field nuclear resonance ordered state evidence complex (probably noncoplanar chiral) long-range structure. The large orbital moment on ${\mathrm{Ru}}^{3+}$ found density-functional calculations.
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