Low-dimensional quantum magnetism in Cu(NCS)${}_2$: A molecular framework material

Abstract

Low-dimensional magnetic materials with spin-$\frac{1}{2}$ moments can host a range of exotic magnetic phenomena due to the intrinsic importance of quantum fluctuations to their behavior. Here, we report the structure, magnetic structure and magnetic properties of copper(II) thiocyanate, Cu(NCS)${}_2$, a one-dimensional coordination polymer which displays low-dimensional quantum magnetism. Magnetic susceptibility, electron paramagnetic resonance (EPR) spectroscopy, ${}^{13}$C magic-angle spinning nuclear magnetic resonance (MASNMR) spectroscopy, and density functional theory (DFT) investigations indicate that Cu(NCS)${}_2$ behaves as a two-dimensional array of weakly coupled antiferromagnetic spin chains ($J_2=133(1)$ K, $\alpha =J_1/J_2=0.08$). Powder neutron-diffraction measurements confirm that Cu(NCS)${}_2$ orders as a commensurate antiferromagnet below $T_{\mathrm{N}}=12$ K, with a strongly reduced ordered moment (0.3 ${\mu }_{\mathrm{B}}$) due to quantum fluctuations.

11 pages, 7 figures

References in corpus (14)

• A linear response approach to the calculation of the effective interaction parameters in the LDA+U method
• Mantid - Data Analysis and Visualization Package for Neutron Scattering and $\mu SR$ Experiments
• Fractional spinon excitations in the quantum Heisenberg antiferromagnetic chain
• Fractional excitations in the square-lattice quantum antiferromagnet
• Ferroelectric Transition Induced by the Incommensurate Magnetic Ordering in LiCuVO4
• Spin-flop transition in uniaxial antiferromagnets: magnetic phases, reorientation effects, multidomain states
• Designing Kitaev spin liquids in metal-organic frameworks
• CuBr2-A New Multiferroic Material with High Critical Temperature
• Dimensionality selection in a molecule-based magnet
• Spin order and dynamics in the diamond-lattice Heisenberg antiferromagnets CuRh2O4 and CoRh2O4
• Magnetism in a family of $S=1$ square lattice antiferromagnets Ni$X_2$(pyz)${}_2$ ($X=$ Cl, Br, I, NCS; pyz = pyrazine)
• Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer
• Dominant ferromagnetism in the spin-1/2 half-twist ladder 334 compounds, Ba3Cu3In4O12 and Ba3Cu3Sc4O12
• Pressure-Induced Enhancement of the Magnetic Anisotropy in Mn(N(CN)${}_2$)${}_2$

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