Magnetic structure and exchange interactions in the layered semiconductor CrPS4

S. Calder, A. V. Haglund, Y. Liu, D. M. Pajerowski, H. B. Cao, T. J. Williams, V. O. Garlea, and D. Mandrus
Phys. Rev. B 102, 024408 – Published 6 July 2020

Abstract

Compounds with two-dimensional (2D) layers of magnetic ions weakly connected by van der Waals bonding offer routes to enhance quantum behavior, stimulating both fundamental and applied interest. CrPS4 is one such magnetic van der Waals material, however, it has undergone only limited investigation. Here we present a comprehensive series of neutron scattering measurements to determine the magnetic structure and exchange interactions. The observed magnetic excitations allow a high degree of constraint on the model parameters not normally associated with measurements on a powder sample. The results demonstrate the 2D nature of the magnetic interactions, while also revealing the importance of interactions along 1D chains within the layers. The subtle role of competing interactions is observed, which manifest in a nontrivial magnetic transition and a tunable magnetic structure in a small applied magnetic field through a spin-flop transition. Our results on the bulk compound provide insights that can be applied to an understanding of the behavior of reduced layer CrPS4.

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  • Received 3 April 2020
  • Revised 18 May 2020
  • Accepted 15 June 2020

DOI:https://doi.org/10.1103/PhysRevB.102.024408

©2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

S. Calder1,*, A. V. Haglund2, Y. Liu1, D. M. Pajerowski1, H. B. Cao1, T. J. Williams1, V. O. Garlea1, and D. Mandrus2,3

  • 1Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 2Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 3Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

  • *caldersa@ornl.gov

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Issue

Vol. 102, Iss. 2 — 1 July 2020

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