Low-temperature structural transition in FeCr2S4
Abstract
Transmission electron microscopy studies of [110] and [111] oriented FeCr2S4 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 Fe2+ ions and trigonal distortions due to a displacement of the Cr3+ ions in the <111> direction.
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