A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf
.
Heat capacity measurements on FeAs-based compounds: a thermodynamic probe of electronic and magnetic states
2009
New Journal of Physics
We report heat capacity measurements of the pnictide materials SmFeAsO_1-xF_x, NdFeAsO, LaFeAsO_1-xF_x and LiFeAs. For SmFeAsO_1-xF_x, with x close to 0.1, we use 3 He measurements to demonstrate a transfer of entropy from the peak at TN to a previously unidentified 2 K feature which grows with increasing doping. Our results on the Sm samples are compared with a similarly doped La sample to elucidate the crystal field levels of the Sm3+ ion at 0, 23, and 56 meV which lead to a Schottky-like
doi:10.1088/1367-2630/11/2/025010
fatcat:efzrz7hamfbgjn4rhktljji2iu