Topotactic fluorination of intermetallics as an efficient route towards quantum materials.

ABSTRACT: Intermetallics represent an important family of compounds, in which insertion of light elements (H, B, C, N) has been widely explored for decades to synthesize novel phases and promote functional materials such as permanent magnets or magnetocalorics. Fluorine insertion, however, has remained elusive so far since the strong reactivity of this atypical element, the most electronegative one, tends to produce the chemical decomposition of these systems. Here, we introduce a topochemical method to intercalate fluorine atoms into intermetallics, using perfluorocarbon reactant with covalent C-F bonds. We demonstrate the potential of this approach with the synthesis of non-stoichiometric mixed anion (Si-F) LaFeSiF_x single-crystals, which are further shown to host FeSi-based superconduc

SUBMITTER: Vaney JB 

PROVIDER: S-EPMC8933527 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature