Low-dimensional magnetic materials with spin-21 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, 13C 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 (J2=133(1) K, α=J1/J2=0.08). Powder neutron-diffraction measurements confirm that Cu(NCS)2 orders as a commensurate antiferromagnet below TN=12 K, with a strongly reduced ordered moment (0.3 μB) due to quantum fluctuations.
@article{arxiv.1710.04889,
title = {Low-dimensional quantum magnetism in Cu(NCS)$_2$: A molecular framework material},
author = {Matthew J. Cliffe and Jeongjae Lee and Joseph A. M. Paddison and Sam Schott and Paromita Mukherjee and Michael W. Gaultois and Pascal Manuel and Henning Sirringhaus and Siân E. Dutton and Clare P. Grey},
journal= {arXiv preprint arXiv:1710.04889},
year = {2018}
}