The dynamics and critical properties of FePS3, an Ising-like twodimensional magnet on a honeycomb lattice
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Date
2014-02-05
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Institute of Physics
Abstract
The MPS3 compounds (M = transition metal) are a family of materials where the M2+ ions lie in planes forming a honeycomb lattice. The planes are weakly bound by van der Waals forces and, when the M2+ carries a magnetic moment, the materials are good approximations of two-dimensional (2D) antiferromagnets.
The FePS3 compound is of particular interest as it is a rare example of an Ising-like 2D magnet with honeycomb symmetry [1]. We have performed experiments with neutron scattering to investigate the magnon dynamics on both a powder [2] and, more recently, on a single crystal. We have further made extensive measurements of the critical dynamics of the compound. We will present our results, showing the magnon dispersion surface and the magnitudes of the exchange interactions along with the scaling behaviour of the
magnetization and the anisotropy. The results will be contrasted with a sister compound, MnPS3, which is a good example of a Heisenberg-like 2D magnet. We will also discuss the possibilities for tricritical points and quantum phase transitions in this compound.
Description
Keywords
Iron, Phosphorus, Magnets, Honeycomb structures, Ions, Van der Waals forces, Antiferromagnetism, Crystal lattices
Citation
Wildes, A., Rule, K., Lançon, D., & Hicks, T. (2014). The dynamics and critical properties of FePS3, an Ising-like two-dimensional magnet on a honeycomb lattice. Invited paper presented to the 38th Annual Condensed Matter and Materials Meeting 2014, Waiheke Island Resort, Waiheke, Auckland, New Zealand, 4th February - 7th February, 2014, (pp. 39). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2014/Wagga2014proceedings.pdf