XAFS-spectroscopy of EuCu_2Si_2

摘要

We report the results of the intermediate valence compound EuCu_2Si_2 local electron and crystalline structure studies by means of L_3-Eu XANES and K-Cu EXAFS spectroscopy. Temperature dependence of the europium valence has been defined. In EXAFS studies, we have analyzed Cu atoms local environment and have revealed bond length and rigidity parameters of Cu-Si, Cu-Cu and Cu-Eu coordination spheres.