Low-dimensional Quantum Magnetism in Cu(NCS)<sub>2</sub>, a Molecular Framework Material

ORAL

Abstract

Low dimensional magnetic materials with spin-1/2 moments can host a range of exotic magnetic phenomena due to the intrinsic importance of quantum fluctuations to their behaviour. In this work 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, 13C 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 below TN=12 K Cu(NCS)2 orders as a commensurate G-type antiferromagnet with a strongly-reduced ordered moment (0.3 μB) due to quantum fluctuations.

*M.J.C. thanks Sidney Sussex College, University of Cambridge for financial support.

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Presenters

  • Matthew Cliffe

    • University of Cambridge
    • Chemistry, University of Cambridge

Authors

  • Matthew Cliffe

    • University of Cambridge
    • Chemistry, University of Cambridge

  • Jeongjae Lee

    • Chemistry, University of Cambridge

  • Joseph Paddison

    • School of Physics, Georgia Institute of Technology
    • University of Cambridge
    • Physics, Georgia Inst of Tech
    • Physics, University of Cambridge

  • Sam Schott

    • Physics, University of Cambridge

  • Paromita Mukherjee

    • Physics, University of Cambridge

  • Michael Gaultois

    • University of Cambridge
    • Chemistry, University of Cambridge

  • Pascal Manuel

    • Rutherford Appleton
    • ISIS Facility, Science and Technology Facilities Council
    • STFC
    • ISIS Facility, Rutherford Appleton Lab

  • Henning Sirringhaus

    • Physics, University of Cambridge

  • Sian Dutton

    • Physics, University of Cambridge

  • Clare Grey

    • Chemistry, University of Cambridge