| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1601261 | Intermetallics | 2010 | 6 Pages |
Investigation of the Gd–Co system around the composition Gd4Co3 showed that this compound does not exist. When samples with the nominal composition Gd4Co3 are synthesized a mixture of Gd12Co7 and Gd6Co4.85(2) (=Gd4Co3.23(2)) is observed. Gd6Co4.85(2) is the only compound found around the composition Gd:Co = 4:3. Its structure was determined by means of X-ray diffraction on single crystal with the space group P63/m. The cell parameters are a = 11.593(2) Å and c = 4.0495(14) Å. Its structure is closely related to the Ho4Co3.07-type or to the Ce6Ni1.67Si3-type structure. Gd6Co4.85(2) exhibits only one ferro(ferri)magnetic transition at 219(1) K and the second magnetic transition at 163 K, wrongly attributed to a spin reorientation, corresponds indeed to the ferromagnetic transition of the impurity Gd12Co7. Gd6Co4.85(2) presents magnetocaloric properties with a maximal adiabatic temperature change ΔTad equal to 4.4 K for μ0ΔH = 4.5 T.
