Perpendicular magnetic anisotropy modulated by interfacial magnetoelectric coupling in Fe4N/0.75Pb(Mg1/3Nb2/3)O3-0.25PbTiO3 multiferroic heterostructures
Perpendicular magnetic anisotropy modulated by interfacial magnetoelectric coupling in Fe4N/0.75Pb(Mg1/3Nb2/3)O3-0.25PbTiO3 multiferroic heterostructures
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DOI：
10.1088/1361-6463/ab1c45
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发表时间：
2019-06
期刊：
影响因子：
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通讯作者：
Zirun Li;W. Mi;H. Bai
中科院分区：
文献类型：
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作者：
Zirun Li;W. Mi;H. Bai
铁磁/PMN-PT多铁性异质结构中的电场控制磁各向异性由于其在节能信息存储方面的应用前景而引起了人们的极大兴趣。因此，我们研究了铁电极化和界面氧化对Fe_4N/PMN-PT多铁性异质结构的磁各向异性的影响，采用第一性原理计算。铁电极化的反转产生了相当大的增加Fe 4 N/PMN-PT异质结构的垂直磁各向异性，而界面氧化改变的磁各向异性的符号。Fe 4 N/PMN-PT异质结的磁各向异性调制归因于磁电耦合效应诱导的自旋轨道耦合Pb p态。这些结果为实现多铁性异质结构中垂直磁各向异性的电场控制奠定了基础。
Electric-field-controlled magnetic anisotropy in ferromagnetic/PMN-PT multiferroic heterostructure attracts great interest due to its promising application for energy-efficient information storage. Herewith, we investigate the effect of ferroelectric polarization and interfacial oxidation on magnetic anisotropy in Fe4N/PMN-PT multiferroic heterostructure using first-principles calculations. The reversal of ferroelectric polarization produces a sizable increase in the perpendicular magnetic anisotropy of Fe4N/PMN-PT heterostructures while the interfacial oxidation changes the sign of the magnetic anisotropy. The modulation of magnetic anisotropy in Fe4N/PMN-PT heterostructure is attributed to the spin–orbit-coupled Pb p states induced by the magnetoelectric coupling effect. These results lay the foundation for realizing electric-field control of perpendicular magnetic anisotropy in multiferroic heterostructures.