Exchange Bias in Layered GdBaCo2O5.5 Cobaltite
- 作者: Solin N.I.1, Naumov S.V.1, Telegin S.V.1, Korolev A.V.1
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隶属关系:
- M.N. Mikheev Institute of Metal Physics, Ural Branch
- 期: 卷 125, 编号 6 (2017)
- 页面: 1096-1101
- 栏目: 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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详细
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.
作者简介
N. Solin
M.N. Mikheev Institute of Metal Physics, Ural Branch
编辑信件的主要联系方式.
Email: solin@imp.uran.ru
俄罗斯联邦, Yekaterinburg, 620108
S. Naumov
M.N. Mikheev Institute of Metal Physics, Ural Branch
Email: solin@imp.uran.ru
俄罗斯联邦, Yekaterinburg, 620108
S. Telegin
M.N. Mikheev Institute of Metal Physics, Ural Branch
Email: solin@imp.uran.ru
俄罗斯联邦, Yekaterinburg, 620108
A. Korolev
M.N. Mikheev Institute of Metal Physics, Ural Branch
Email: solin@imp.uran.ru
俄罗斯联邦, Yekaterinburg, 620108
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