[Back]

M. Reissner, W. Steiner, J. Wernisch, H. Boller:
"Debye temperature and magnetic ordering in K_xBa_1−xFe₂S₃";
Hyperfine Interactions, 169 (2006), 1301 - 1304.

⁵⁷Fe Mössbauer measurements are reported for the series K x Ba_1−x Fe₂S₃, x ≤ 0.3, at temperatures between 4.2 K ≤ T ≤ 294 K. A decrease of the Debye temperature from 435 to 405 K with x, indicates a weakening of the stiffness of the Fe sublattice. The ordering temperatures, taken from the appearance of magnetic hyperfine splitting in the spectra, are approximately 40 K lower for x ≥ 0.1. The values of the centre shift and the small temperature dependence of the quadrupole splitting strongly supports that similar to the border compound BaFe₂S₃ also the K containing samples should be characterised as mixed valence compounds.

⁵⁷Fe Mössbauer measurements - Debye temperature - thioferrates

http://dx.doi.org/10.1007/s10751-006-9442-y

http://www.springerlink.com/content/xq616121825u0572/