Anisotropy of X-ray Absorption Cross Section in CeCoGe3 Single Crystal

Crystals

Fabrice Wilhelm¹  Andrei Rogalev¹  Ksenia Kozlovskaya²  Roman Bakonin²  Aydar Enikeev²  Elena Ovchinnikova²  Alexey Oreshko²  VladimirE. Dmitrienko³  Dai Aoki⁴ 

[1] European Synchrotron Radiation Facility, 38043 Grenoble, France;Faculty of Physics, M.V. Lomonosov Moscow State University, 119991 Moscow, Russia;Federal Scientific Research Center “Crystallography and Photonics”, A.V. Shubnikov Institute of Crystallography, 119333 Moscow, Russia;IMR, Tohoku University, Oarai 311-1313, Japan;

关键词: X-ray absorption;    X-ray linear dichroism;    anisotropy of X-ray susceptibility;   

DOI  :  10.3390/cryst11050544

来源: DOAJ

【 摘 要 】

Absorption spectra of two orthogonal linearly polarized X-rays in a single CeCoGe₃ crystal were measured at the ID12 beamline of the ESRF for the energies near the K-edges of Ge, Co and near the L₂₃ edges of Ce. The X-ray natural linear dichroism (XNLD) was revealed in the vicinity of all the absorption edges, which indicates a splitting of electronic states in a crystalline field. Mathematical modelling in comparison with experimental data allowed the isotropic and anisotropic parts of atomic absorption cross section in CeCoGe₃ to be determined near all measured absorption edges. The calculations also show that the “average” anisotropy of the cross section close to the Ge K-edge revealed in the experiment is less than the partial anisotropic contributions corresponding to Ge atoms in two different Wyckoff positions.

【 授权许可】

Unknown