Low-dimensional quantum magnetism in Cu(NCS)<sub>2</sub>: A molecular framework material



Cliffe, Matthew J, Lee, Jeongjae, Paddison, Joseph AM, Schott, Sam, Mukherjee, Paromita, Gaultois, Michael W ORCID: 0000-0003-2172-2507, Manuel, Pascal, Sirringhaus, Henning, Dutton, Sian E and Grey, Clare P
(2018) Low-dimensional quantum magnetism in Cu(NCS)<sub>2</sub>: A molecular framework material. PHYSICAL REVIEW B, 97 (14). 144421-.

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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.

Item Type: Article
Additional Information: 11 pages, 7 figures
Uncontrolled Keywords: cond-mat.str-el, cond-mat.str-el, cond-mat.mtrl-sci
Depositing User: Symplectic Admin
Date Deposited: 31 Jan 2020 09:18
Last Modified: 17 Oct 2023 16:11
DOI: 10.1103/PhysRevB.97.144421
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3072804