Local Environment and Electronic Structure in K2NiF4-type La2Li0.50Cu0.50O4 Doped by 57Feстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 29 мая 2015 г.
Аннотация:The Fe-57 Mossbauer spectrum of the oxide La2Li0.50Cu0.50O4 doped with Fe-57 (1 at.-%) underlines at 300 K the presence of three different components: two corresponding to the substitution of Fe-57 probe atoms for respectively "Cu3+" [Fe(1)] and Li+ [Fe(3)] and the third [Fe(2)] attributed to Fe-57 associated with oxygen vacancies. A decrease of the temperature down to 77 K does not lead to essential changes of the Mossbauer parameters corresponding to the Fe(1) and Fe(2) sub-spectra. On the contrary, a drastic change occurs in the Fe(3) sub-spectrum which has been interpreted by a displacement of the charge-transfer equilibrium Fe4+(3) + O2- -> Fe3+(3) + O((L) under bar) at the Li+ sites.