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Ultrathin limit of exchange bias coupling at oxide multiferroic/ ferromagnetic interfaces
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Ultrathin limit of exchange bias coupling at oxide multiferroic/ ferromagnetic interfaces

M. Huijben, P. Yu, L.W. Martin, H.J.A. Molegraaf, Y.-H. Chu, M.B. Holcomb, N. Balke, G. Rijnders 和 R. Ramesh
Advanced Materials, 卷.25(34), 頁碼.4739-4745
09/2013
DOI: https://doi.org/10.1002/adma.201300940

摘要

exchange bias ferromagnet interface multiferroic oxide heterostructure Materials Science (all) Mechanics of Materials Mechanical Engineering
Exchange bias coupling at the multiferroic- ferromagnetic interface in BiFeO 3 /La 0.7 Sr 0.3 MnO 3 heterostructures exhibits a critical thickness for ultrathin BiFeO 3 layers of 5 unit cells (2 nm). Linear dichroism measurements demonstrate the dependence on the BiFeO 3 layer thickness with a strong reduction for ultrathin layers, indicating diminished antiferromagnetic ordering that prevents interfacial exchange bias coupling. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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