Steplike metamagnetic transitions in a honeycomb lattice antiferromagnet Tb2Ir3Ga9

Mojammel A. Khan, Qiang Zhang, Jin-Ke Bao, Randy S. Fishman, A. S. Botana, Y. Choi, G. Fabbris, D. Haskel, John Singleton, and J. F. Mitchell
Phys. Rev. Materials 3, 114411 – Published 21 November 2019
PDFHTMLExport Citation

Abstract

Single crystals of a honeycomb lattice antiferromagnet, Tb2Ir3Ga9, were synthesized, and the physical properties have been studied. From magnetometry, a long-range antiferromagnetic ordering at 12.5 K with highly anisotropic magnetic behavior was found. Neutron powder diffraction confirms that the Tb spins lie along the a-axis, parallel to the shortest Tb-Tb contact. Two field-induced spin-flip transitions are observed when the field is applied parallel to this axis, separated by a plateau corresponding roughly to MMs/2. Transport measurements show the resistivity to be metallic with a discontinuity at the onset of Néel order. Heat capacity shows a λ-like transition confirming the bulk nature of the magnetism. We propose a phenomenological spin Hamiltonian that describes the magnetization plateau as a result of strong Ising character arising from a quasidoublet ground state of the Tb3+ ion in a site of Cs symmetry and expressing a significant bond-dependent anisotropy.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
2 More
  • Received 22 June 2019
  • Revised 20 September 2019

DOI:https://doi.org/10.1103/PhysRevMaterials.3.114411

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Mojammel A. Khan1,*, Qiang Zhang2, Jin-Ke Bao1, Randy S. Fishman3, A. S. Botana4, Y. Choi5, G. Fabbris5, D. Haskel5, John Singleton6, and J. F. Mitchell1

  • 1Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
  • 2Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 3Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 4Department of Physics, Arizona State University, Tempe, Arizona 85281, USA
  • 5Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 6National High Magnetic Field Laboratory, Los Alamos National Laboratory, MS-E536, Los Alamos, New Mexico 87545, USA

  • *mkhan19@anl.gov, mojammelkhan1987@gmail.com

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 3, Iss. 11 — November 2019

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Materials

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×