Anisotropic magnetic properties of the triangular plane lattice material TmMgGaO4

F. Alex Cevallos, Karoline Stolze, Tai Kong, R. J. Cava

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


The crystal growth, structure, and basic magnetic properties of TmMgGaO4 are reported. The Tm ions are located in a planar triangular lattice consisting of distorted TmO6 octahedra, while the Mg and Ga atoms randomly occupy intermediary bilayers of M-O triangular bipyramids. The Tm ions are positionally disordered. The material displays an antiferromagnetic Curie Weiss theta of ∼−20 −25 K, with no clear ordering visible in the magnetic susceptibility down to 1.8 K; the structure and magnetic properties suggest that ordering of the magnetic moments is frustrated by both structural disorder and the triangular magnetic motif. Single crystal magnetization measurements indicate that the magnetic properties are highly anisotropic, with large moments measured perpendicular to the triangular planes. At 2 K, a broad step-like feature is seen in the field-dependent magnetization perpendicular to the plane on applied field near 2 T.

Original languageEnglish (US)
Pages (from-to)154-158
Number of pages5
JournalMaterials Research Bulletin
StatePublished - Sep 2018

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


  • A. Layered compounds
  • A. Magnetic materials
  • A. Oxides


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