The compound Fe0.34TiSe2 crystallizes in space group D33d-P3̄ml of the trigonal system with 8 formula units in a cell of dimensions a = 7.148(4), c = 11.880(7) Å at 117 K. The structure of Fe0.34TiSe2 can be derived from that of TiSe2 by insertion of Fe atoms into some of the octahedral holes between the layers. No two adjacent octahedral holes along c contain Fe atoms, that is no two Fe atoms are related by a translation of c 2. The compound FexTiSe2, x = 0.34, exhibits physical properties remarkably different from those found in either the host material, TiSe2, or in low iron concentration (x < 0.2) intercalated materials. The electrical resistivity of this compound exhibits a sharp decrease below 120 K which is coincident with a well defined peak in the Hall coefficient. These data have been interpreted as the onset of antiferromagnetic ordering as suggested by results of magnetic susceptibility measurements. Optical reflectance measurements indicate a simple Drude-like free carrier behavior and are consistent with the interpretation of iron as an electron donor in this material.
|Original language||English (US)|
|Number of pages||9|
|Journal||Journal of Physics and Chemistry of Solids|
|State||Published - 1982|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics