4.2 Article

Role of electrodes materials in determining the interfacial and magnetoelectric properties in BaTiO3-based multiferroic tunnel junctions

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EUROPEAN PHYSICAL JOURNAL B
卷 90, 期 10, 页码 -

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SPRINGER
DOI: 10.1140/epjb/e2017-80125-5

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  1. National Natural Science Foundation of China [51402275, 11347106, 11404309, 11504356, 11547048]

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Using the first-principles calculations based on density functional theory, the important role of electrode materials in determining the interfacial, ferroelectric stability and magnetoelectric properties in BaTiO3-based multiferroic tunnel junctions (MFTJs) have been investigated comparatively. It is found that the SrO-TiO2 interface of MFTJs with oxide electrode SrRuO3 is the most favorable interfacial structure. The average ferroelectric polarizations of MFTJs with electrode Co, FeCo and SrRuO3 are 25, 36 and 0 mu C/cm(2), respectively. The using of alloy electrode FeCo is more contributed to ferroelectric stability and the enhancement of magnetoelectric coupling of BaTiO3-based MFTJs. We expect our findings can provide an essential evaluation for the selection of electrode materials in spintronic storage devices.

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