|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Monoclinic honeycomb – layered compound Li3Ni2SbO6: preparation, crystal structure and magnetic propertiesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Zvereva E.A., Evstigneeva M.A., Nalbandyan V.B., Savelieva O.A., Ibragimov S.A., Volkova O.S., Medvedeva L.I., Vasiliev A.N., Klingeler R., Buechner B.
- Журнал: Dalton Transactions
- Том: 41
- Год издания: 2012
- Издательство: Royal Society of Chemistry
- Местоположение издательства: United Kingdom
- Первая страница: 572
- Последняя страница: 580
- DOI: 10.1039/C1DT11322D
- Аннотация: Two synthetic routes—ion-exchange preparation from layered Na3Ni2SbO6 at 300 °C and direct solid-state synthesis at 1150 °C resulted in layered Li3Ni2SbO6, a cation-ordered derivative from the rocksalt type. The Fddd form reported earlier could not be reproduced. According to the XRD Rietveld analysis, Li3Ni2SbO6 is a pseudohexagonal monoclinic structure, C2/m, with a = 5.1828(2) Å, b = 8.9677(3) Å, c = 5.1577(2) Å, β = 109.696(2)°. No Li/Ni mixed occupancy was detected. At high temperatures, the magnetic susceptibility follows the Curie–Weiss law with a positive value of Weiss temperature, [similar]8 K, indicating a predominance of ferromagnetic interactions. However, Li3Ni2SbO6 orders antiferromagnetically at TN [similar] 15 K. The effective magnetic moment is 4.3 μB/f.u. which satisfactorily agrees with theoretical estimations assuming high-spin configuration of Ni2+ (S = 1). Electron spin resonance (ESR) spectra show single Lorentzian shape line attributed to Ni2+ion in octahedral coordination. The absorption is characterized by isotropic temperature independent effective g-factor g = 2.150 ± 0.005. In accordance with the layered honeycomb crystal structure determined for Li3Ni2SbO6, the superexchange interaction between Ni2+ ions through Ni–O–Ni pathways within Ni2SbO6 layers are assumed to be ferromagnetic, while the dominant interaction between layers is antiferromagnetic.
- Добавил в систему: Зверева Елена Алексеевна