Structural disorder and elementary magnetic properties of triangular lattice ErMgGaO4 single crystals

F. Alex Cevallos, Karoline Stolze, Robert J. Cava

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The single crystal growth, structure, and basic magnetic properties of ErMgGaO4 are reported. The structure consists of triangular layers of magnetic ErO6 octahedra separated by a double layer of randomly occupied non-magnetic (Ga,Mg)O5 bipyramids. The Er atoms are positionally disordered. Magnetic measurements parallel and perpendicular to the c axis of a single crystal reveal dominantly antiferromagnetic interactions, with a small degree of magnetic anisotropy. A weighted average of the directional data suggests an antiferromagnetic Curie Weiss temperature of approximately −30 K. Below 10 K the temperature dependences of the inverse susceptibilities in the in-plane and perpendicular-to plane directions are parallel, indicative of an isotropic magnetic moment at low temperatures. No sign of magnetic ordering is observed above 1.8 K, suggesting that ErMgGaO4 is a geometrically frustrated magnet.

Original languageEnglish (US)
Pages (from-to)5-8
Number of pages4
JournalSolid State Communications
StatePublished - Aug 2018

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


  • A. Geometrically frustrated oxides
  • C. Crystal structure and symmetry


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