Вид документа : Шифр издания : 54/V 18 Автор(ы) : Galakhov V. R., Melkozerova M. A., Chupakhina T. I., Bazuev G. V., Raekers M., Neumann M., Molodtsov S. L. Заглавие : Valence States of 3d Ions in Lanthanum Manganites–Cobaltites, Determined by X-Ray Spectroscopy Место публикации : Bulletin of the Russian Academy of Sciences: Physics. - 2008. - Vol. 72, № 10. - С. P. 1403-1405: il. Примечания : Bibliogr. : p. 1405 (12 ref.) ISSN: 1062-8738 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): манганиты--кобальтиты--лантан Аннотация: The valence states of manganese and cobalt ions in lanthanum manganites–cobaltites La1−xCaxMn0.5Co0.5O3 have been determined by 2p X-ray absorption and 3s X-ray photoelectron spectroscopies. The nanostructured P1 manganite–cobaltite phase with the concentration x= 0, obtained by the citrate method at a temperature of 700°C, is characterized by a valence state of cobalt ions close to 2+ and a valence state of Mn ions of about 3.5+. The P2 phase at the same calcium concentration, synthesized by the high-temperature solid-phase method at a temperature of 1300°C , is characterized by a manganese valence of 3.5+ and a cobalt valence of about 2.3+. An increase in the dopant concentration leads to an increase in the average valence of 3d ions Доп.точки доступа: Galakhov, V. R.; Melkozerova, M. A.; Chupakhina, T. I.; Bazuev, G. V.; Raekers, M.; Neumann, M.; Molodtsov, S. L.