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 language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Apr 8 2010|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics