Magnetic structure and properties of the S=5 2 triangular antiferromagnet α-NaFe O2

T. McQueen, Q. Huang, J. W. Lynn, R. F. Berger, T. Klimczuk, B. G. Ueland, P. Schiffer, R. J. Cava

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The magnetic properties of α-NaFe O2 are studied by neutron-diffraction and magnetization measurements. An ordered phase with spins aligned along the b hex axis exists at low temperatures (T<4 K). At intermediate temperatures (4 K<T<11 K), the system passes through an incommensurate ordered phase before transforming into a short-range-ordered state at higher temperatures that persists up to at least 50 K. Although the short-range ordering does not persist to room temperature according to neutron diffraction, the magnetic susceptibility does not follow the Curie-Weiss behavior, even up to 320 K. This rich magnetic behavior can be understood qualitatively as a competition between different magnetic exchange interactions that are similar in magnitude. The delicate balance between these interactions makes α-NaFe O2 a candidate for more detailed theoretical work to understand magnetic behavior in frustrated magnetic systems.

Original languageEnglish (US)
Article number024420
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
StatePublished - Jul 16 2007

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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