| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1333754 | Journal of Solid State Chemistry | 2008 | 12 Pages |
Single crystals of CeAu4Si2 and CeAu2Si2 have been grown out of ternary fluxes rich in Au, and the former, also by sintering the stoichiometric composition at 750 °C. The single-crystal X-ray refinement result for CeAu4Si2 is orthorhombic, Cmmm (No. 65, Z=2), different from a tetragonal result found from an X-ray powder diffraction refinement [H. Nakashima, et al., J. Alloys Compds. 424 (2006) 7]. For CeAu2Si2, this is the first report of the stoichiometric crystalline phase, in the known tetragonal I4/mmm structure. The anisotropic field- and temperature-dependent magnetizations, as well as specific heat and resistivity data are compared. Although both compounds have related structural packing, they present unique magnetic features. CeAu2Si2 is a typical antiferromagnet with TN=8.8(1) K and CeAu4Si2 features a ferromagnetic component below Tc=3.3(1) K. Both phases have effective moments close in value to that of free Ce3+.
Graphical abstractThe magnetization versus applied field for CeAu2Si2 along two crystallographic directions.Figure optionsDownload full-size imageDownload as PowerPoint slide
