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NMR Study of Influence of the Defects to the Magnetic Interactions and Ground State of Honeycomb Compound Li3M2SbO6 (where M is Cu and Ni)тезисы доклада
- Авторы: Salikhov T., Zvereva E., Nalbandyan V., Vasiliev A., Vavilova E.
- Сборник: Abstracts of Intern. Conf. Modern Development of Magnetic Resonance (MDMR 2018)
- Тезисы
- Год издания: 2018
- Место издания: Kazan, Russia
- Первая страница: 178
- Аннотация: A new generation of layered antimonite A3M2SbO6 (where A = Li, Na and M is transition metal) with honeycomb structure is in the focus of the attention of the investigation during last years. In these compounds ordered mixed-layers of magnetic cations M2+ and Sb6+ alternate with non-magnetic alkali metal layers. The crystal structures are very soft and even slight modification results in drastic changes in the magnetic properties. The non-stoichiometry and the non-magnetic defects in such systems are very important factors that allow adjusting their magnetic and electrical characteristics. Here we present the results of NMR study of Li3M2SbO6 (where M is Cu and Ni) in presents of non-stoichiometry. We show that the lithium deficiency and the site inversion in these compounds lead to the transformation of interactions in a two-dimensional hexagonal lattice and change the ground state. Moreover, the appearance of vacancies at the position of lithium increases its mobility, which can be detected by NMR-relaxometry even in such a magnetically concentrated compound.
- Добавил в систему: Зверева Елена Алексеевна