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

Matthew J. Cliffe, Jeongjae Lee, Joseph A. M. Paddison, Sam Schott, Paromita Mukherjee, Michael W. Gaultois, Pascal Manuel, Henning Sirringhaus, Siân E. Dutton, and Clare P. Grey
Phys. Rev. B 97, 144421 – Published 25 April 2018
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Abstract

Low-dimensional magnetic materials with spin-12 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 spectroscopy, C13 magic-angle spinning nuclear magnetic resonance spectroscopy, and density functional theory 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=12K, with a strongly reduced ordered moment (0.3μB) due to quantum fluctuations.

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  • Received 13 October 2017
  • Revised 30 March 2018

DOI:https://doi.org/10.1103/PhysRevB.97.144421

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Matthew J. Cliffe1, Jeongjae Lee1, Joseph A. M. Paddison2, Sam Schott3, Paromita Mukherjee3, Michael W. Gaultois1, Pascal Manuel4, Henning Sirringhaus3, Siân E. Dutton3, and Clare P. Grey1,*

  • 1Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
  • 2Churchill College, University of Cambridge, Storey's Way, Cambridge CB3 0DS, United Kingdom
  • 3Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
  • 4ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, United Kingdom

  • *cpg27@cam.ac.uk

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Issue

Vol. 97, Iss. 14 — 1 April 2018

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