Low-temperature structural transition in FeCr_2S_4

Details Low-temperature structural transition in FeCr_2S_4 Low-temperature structural transition in FeCr_2S_4

2004-06-09

arxiv.org/abs/cond-mat/0406213v1

Physics

Condensed Matter

Materials Science

4 pages, 8 figures

Scientific paper

10.1103/PhysRevB.71.100408

Transmission electron microscopy studies of [110] and [111] oriented FeCr_2S_4 single crystals at different temperatures reveal a structural transition at low temperatures indicating a cubic-to-triclinic symmetry reduction within crystallographic domains. The overall crystal symmetry was found to be reduced from Fd3m to F-43m. The triclinic distortions were suggested to result from the combined actions of tetragonal distortions due to the Jahn-Teller active Fe^2+ ions and trigonal distortions due to a displacement of the Cr^3+ ions in the <111> direction.

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