C 57 Chupakhina, T. I. Synthesis and Magnetic Properties of LaSr2CoMnO7 / T. I. Chupakhina, G. V. Bazuev // Russian Journal of Inorganic Chemistry. - 2008. - Vol., № 5. - P681-685 : il. - Bibliogr. : p. 685 (21 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): РАДДЛЕСДЕНА-ПОППЕРА СТРУКТУРА -- ЩЕЛОЧНОЗЕМЕЛЬНЫЕ МЕТАЛЛЫ -- МАГНИТНЫЕ СВОЙСТВА Аннотация: A new oxide phase LaSr2CoMnO7.00±0.05, a member of the Raddlesden–Popper homologous series An+ 1BnO3n + 1 (n = 2), was synthesized, and its structure and magnetic properties characterized. The unit cell of this phase was indexed in terms of space group I4/mmm with the parameters a = 0.3831(2) nь, Ò = 2.0070(1) nm. The magnetic susceptibility as a function of temperature obeys the Curie–Weiss law in the range 250–350 K. At low temperatures, magnetic anomalies are observed due to the competition between antiferromagnetic and ferromagnetic ordering and spin-glass transition. The charge state of transition metals was ascertained proceeding from magnetic measurements and XANES spectra Полный текст |