Refined Structure and Properties of the Layered Mott Insulator BaCoS2
| Autor: | M. C. Gelabert, G. Jeffrey Snyder, Francis J. DiSalvo |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Condensed matter physics
Magnetic structure Chemistry Mott insulator Electronic structure Condensed Matter Physics Magnetic susceptibility Electronic Optical and Magnetic Materials Inorganic Chemistry Paramagnetism Electrical resistivity and conductivity Materials Chemistry Ceramics and Composites Antiferromagnetism Orthorhombic crystal system Physical and Theoretical Chemistry |
| Zdroj: | Journal of Solid State Chemistry. 113:355-361 |
| ISSN: | 0022-4596 |
| DOI: | 10.1006/jssc.1994.1380 |
| Popis: | BaCoS 2 is orthorhombic Cmma a = 6.4413(3) A, b = 6.4926(3) A, c = 8.9406(3) A, and is closely related to BaNiS 2 , which contains Ni-S layers separated by rock salt BaS sheets. Crystals were grown from the melt by slow cooling from 1050 to 950°C. The sulfur atoms in the Co-S layers have very anisotropic thermal displacement parameters, possibly indicating that these sulfurs are actually in a double well potential centered at a high symmetry position in the space group Cmma . BaCoS 2 is found to be a paramagnetic semiconductor (Mott insulator). The magnetic properties indicate that BaCoS 2 undergoes a transformation at 300 K, which is likely due to the onset of antiferromagnetic order. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|