Frustration-driven quantum fluctuations, along with spin-orbit coupling and crystal electric field can give rise to exotic magnetic phenomena in rare-earth based quantum magnets. Here, we report the magnetic ground state properties of a buckled honeycomb lattice system, ${\mathrm{Nd}}_2{\mathrm{Te}}_4{\mathrm{O}}_{11}$, investigated through thermodynamic and muon spin relaxation (μSR) experiments. This compound crystallizes in monoclinic symmetry, where the $\mathrm{N}{\mathrm{d}}^{3+}$ ions are arranged in a buckled honeycomb lattice. Magnetization and heat capacity studies consistently indicate the formation of $J_{\mathrm{eff}}=1/2$ state in low temperature regime. In zero field, this compound exhibits the signature of magnetic ordering below ∼0.45 K, which is suppressed under applied magnetic field ≥ 30 kOe. In contrast, μSR results reveal the presence of persistent and strong spin fluctuations down to 0.05 K. Our finding points out that ${\mathrm{Nd}}_2{\mathrm{Te}}_4{\mathrm{O}}_{11}$ can be a potential candidate for proximate spin liquidlike behavior.

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• Crystal-field excitations
• Frustrated magnetism
• Quantum spin liquid
• Spin dynamics
• Honeycomb lattice
• Magnetization measurements
• Muon spin relaxation & rotation
• Specific heat measurements
• X-ray diffraction