Exchange Bias in Layered GdBaCo2O5.5 Cobaltite
- Авторы: Solin N.I.1, Naumov S.V.1, Telegin S.V.1, Korolev A.V.1
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Учреждения:
- M.N. Mikheev Institute of Metal Physics, Ural Branch
- Выпуск: Том 125, № 6 (2017)
- Страницы: 1096-1101
- Раздел: Order, Disorder, and Phase Transition in Condensed System
- URL: https://journals.rcsi.science/1063-7761/article/view/191674
- DOI: https://doi.org/10.1134/S1063776117120214
- ID: 191674
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Аннотация
It is established that excess oxygen content δ influences the exchange bias (EB) in layered GdBa-Co2O5 + δ cobaltite. The EB effect arises in p-type (δ > 0.5) cobaltite and disappears in n-type (δ < 0.5) cobaltite. The main parameters of EB in GdBaCo2O5.52(2) polycrystals are determined, including the field and temperature dependences of EB field HEB, blocking temperature TB, exchange coupling energy Ji of antiferromagnet–ferromagnet (AFM–FM) interface, and dimensions of FM clusters. The training effect inherent in systems with EB has been studied. The results are explained in terms of exchange interaction between the FM and AFM phases. It is assumed that the EB originates from the coexistence of Co3+ and Co4+ ions that leads to the formation of monodomain FM clusters in the AFM matrix of cobaltite.
Об авторах
N. Solin
M.N. Mikheev Institute of Metal Physics, Ural Branch
Автор, ответственный за переписку.
Email: solin@imp.uran.ru
Россия, Yekaterinburg, 620108
S. Naumov
M.N. Mikheev Institute of Metal Physics, Ural Branch
Email: solin@imp.uran.ru
Россия, Yekaterinburg, 620108
S. Telegin
M.N. Mikheev Institute of Metal Physics, Ural Branch
Email: solin@imp.uran.ru
Россия, Yekaterinburg, 620108
A. Korolev
M.N. Mikheev Institute of Metal Physics, Ural Branch
Email: solin@imp.uran.ru
Россия, Yekaterinburg, 620108
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