Towards the extraction and control of the Hamiltonian parameters of spin-3/2 Co(II) antiferromagnets.

ORAL

Abstract

Low-dimensional magnetism has potential applications in quantum computing and data storage, as well as furthering theoretical understanding of correlated systems, but challenges remain in designing suitable compounds. We will present a methodology to characterise S = 3/2 Co2+ antiferromagnets that make use of lab-based magnetometry and heat capacity techniques. We have synthesised and characterised four new materials: quasi-0-dimensional (Q0D) Co(HF2)2(3-Brpy)4, Q1D [Co(HF2)(3-Clpy)4]BF4, Q2D CoF2(pyz)2 and CoCl2(pyz-D4)2 to test this method. The results imply that by manipulating the starting components of the synthesis process, one can direct the Hamiltonian of these compounds. The effect structure has on the magnetic properties is described, as well as the influence of ligand and magnetic ion substitution by comparison to complexes containing [Ni(pyz)2]2+ sheets.

A.Vasiliev et al., NPJ Quant. Mater. 3, 18 (2018).
J.Liu et al., Inorg. Chem. 55, 3515 (2016).

*This project has received funding from the ERC grant no. 681260 and the EPSRC. Work at EWU is supported by the NSF through grant no. DMR-1703003. Work at NHMFL is funded by NSF Cooperative Agreements DMR-1157490 and 1164477, the State of Florida and U.S. DoE. JS acknowledges funding from the DoE BES "Science in 100 T" program.

–

Presenters

  • William Blackmore

    • Department of Chemistry, University of Manchester
    • Manchester University

Authors

  • William Blackmore

    • Department of Chemistry, University of Manchester
    • Manchester University

  • Jamie Brambleby

    • University of Warwick

  • John Singleton

    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • Los Alamos National Lab
    • Los Alamos National Laboratory
    • LANL, NHMFL
    • National High Magnetic Field Laboratory (NHMFL), Los Alamos

  • Martin Lees

    • Physics, University of Warwick
    • University of Warwick
    • Department of Physics, The University of Warwick, Coventry, CV4 7AL, United Kingdom

  • Jamie L Manson

    • Department of Chemistry and Biochemistry, Eastern Washington University
    • Eastern Washington University

  • Paul Goddard

    • Department of Physics, University of Warwick
    • University of Warwick
    • Physics, University of Warwick