Crystal and local atomic structure of Co-doped MgFeBO_4 warwickites

Abstract

Single crystalline MgFeBO_4, Mg_0.5Co_0.5FeBO_4 and CoFeBO_4 have been grown by the flux method. The samples have been characterized by X-ray spectral analysis, X-ray diffraction and X-ray absorption spectroscopy. The X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra have been measured at the Fe andCoK-edges over a wide temperature range (6.5 - 300 K). The composition, the charge state and local environment of both Fe and Co atoms have been determined. The effects of Mg substitution by Co on the local structural distortions have been revealed experimentally and the M-O bond anisotropy has been found.

21 pages, 11 figures, 4 tables

References in corpus (4)

• Twisted magnetic patterns: Exploring the Dzyaloshinskii--Moriya vector
• Experimental observation of quantum entanglement in low dimensional spin systems
• Uniaxial anisotropy and low-temperature antiferromagnetism of Mn2BO4 single crystal
• Spin-glass behavior in single crystals of hetero-metallic magnetic warwickites $MgFeB{O}_4$, $M{g}_{0.5}C{o}_{0.5}FeB{O}_4$, and $CoFeB{O}_4$

Cited by in corpus (1)

• Effect of Fe-substitution on the structure and magnetism of single crystals Mn2-xFexBO4