Geometric magnetic frustration in the R -type ferrite SrSn2 Ga1.3 Cr2.7 O11 and the spinel-based chromates

I. D. Posen, T. M. McQueen, A. J. Williams, D. V. West, Q. Huang, R. J. Cava

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SrSn2 Ga1.3 Cr2.7 O11 is shown to be a strongly geometrically frustrated magnet through measurement of its temperature-dependent magnetic susceptibility and specific heat. This material, determined by powder neutron diffraction to have an R -type ferrite crystal structure, has S=3/2 Cr3+ ions in isolated Kagomé planes with no magnetic ions in the intermediary structural layers. The Kagomé planes contain 10% nonmagnetic Ga3+. This structure type makes the chromate family of frustrated magnets unusual because it displays four spinel-based structural variants with the same basic magnetic lattice and different effective dimensionalities and degrees of frustration. A comparison of the structures and magnetic characteristics is presented.

Original languageEnglish (US)
Article number134413
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number13
StatePublished - Apr 8 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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