Spinovye sostoyaniya ionov Co i perekhod metall–poluprovodnik v sloistykh kobal'titakh PrBaCo2O5+δ (δ = 0.52, 0.74)
- Авторлар: Solin N.1, Naumov S.1, Korolev A.1, Galakhov V.1
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Мекемелер:
- Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
- Шығарылым: Том 164, № 5 (2023)
- Беттер: 770-781
- Бөлім: Articles
- URL: https://journals.rcsi.science/0044-4510/article/view/247336
- DOI: https://doi.org/10.31857/S004445102311007X
- EDN: https://elibrary.ru/PKISYU
- ID: 247336
Дәйексөз келтіру
Аннотация
The spin states of Co atoms in PrBaCo2O5 + δ with regard to the paramagnetic contribution of Pr3+ ions have been determined from magnetic property studies for δ = 0.52 and 0.74. Results obtained without considering the paramagnetic contribution of Pr3+ ions are inconsistent with available experimental data. With a decrease in temperature, the metal–insulator transition in PrBaCo2O5.52 becomes sharper according to a sharp change in spin states (from HS/LS to LS/IS) of Co3+ ions. In this case, Co3+ ions occupying octahedra pass from the high-spin state (HS, S = 2) to the low-spin one (LS, S = 0) and those occupying pyramids pass from the LS-state to the intermediate spin state (IS, S = 1), as follows from the available structural data. In PrBaCo2O5.74, the metal–semiconductor transition occurs smoothly from HS/LS to the HS/IS state upon the smooth transition of the Co3+ ion state from (LS, S = 0) to the (IS, S = 1) state in pyramides without change in the spin state of ions Co3+ (HS, S = 2) and Co4+ (LS, S = 1/2) in octahedrons.
Авторлар туралы
N. Solin
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: solin@imp.uran.ru
620108, Yekaterinburg, Russia
S. Naumov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: solin@imp.uran.ru
620108, Yekaterinburg, Russia
A. Korolev
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Email: solin@imp.uran.ru
620108, Yekaterinburg, Russia
V. Galakhov
Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences
Хат алмасуға жауапты Автор.
Email: solin@imp.uran.ru
620108, Yekaterinburg, Russia
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