Using x-ray powder diffraction we investigated the thermal expansion of some selected nonmagnetic compounds (YAl2, YNi2 and YCo2) and some isostructural magnetic Rare Earth-Cobalt compounds (RECo2) in the temperature range from 4K up to 450 K. By comparing the nonmagnetic Y-based compounds we could show that there is a contribution of the spin fluctuations to the thermal expansion in YCo2. In the magnetically ordering RECo2 compounds the induced 3d-magnetism gives rise to large volume anomalies at the magnetic ordering temperature Tc. Below Tc there is also a distortion of the cubic unit cell because of the interaction of the magnetically ordered RE-ions with the anisotropic crystal field.
|Number of pages||6|
|Journal||Materials Science Forum|
|Issue number||pt 2|
|Publication status||Published - 1994|
|Event||Proceedings of the 3rd European Powder Diffraction Conference. Part 2 (of 2) - Vienna, Austria|
Duration: 25 Sep 1993 → 28 Sep 1993