Counterrotating magnetic order in the honeycomb layers of NaNi2BiO6-δ

A. Scheie, K. Ross, P. Peter Stavropoulos, E. Seibel, J. A. Rodriguez-Rivera, J. A. Tang, Yi Li, Hae Young Kee, R. J. Cava, C. Broholm

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Abstract

We report the magnetic structure and electronic properties of the honeycomb antiferromagnet NaNi2BiO5.66. We find magnetic order with moments along the c axis for temperatures below Tc1=6.3(1)K and then in the honeycomb plane for T<Tc2=4.8(1)K with a counterrotating pattern and an ordering wave vector q=(13,13,0.15(1)). Density functional theory and electron spin resonance indicate this is high-spin Ni3+ magnetism near a high to low spin transition. The ordering wave vector, in-plane magnetic correlations, missing entropy, spin state, and superexchange pathways are all consistent with bond-dependent Kitaev-Γ-Heisenberg exchange interactions in NaNi2BiO6-δ.

Original languageEnglish (US)
Article number214421
JournalPhysical Review B
Volume100
Issue number21
DOIs
StatePublished - Dec 18 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Scheie, A., Ross, K., Stavropoulos, P. P., Seibel, E., Rodriguez-Rivera, J. A., Tang, J. A., Li, Y., Kee, H. Y., Cava, R. J., & Broholm, C. (2019). Counterrotating magnetic order in the honeycomb layers of NaNi2BiO6-δ. Physical Review B, 100(21), [214421]. https://doi.org/10.1103/PhysRevB.100.214421