Strain-mediated electric-field control of multiferroic domain structures in ferromagnetic films
Strain-mediated electric-field control of multiferroic domain structures in ferromagnetic films
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DOI：
10.1063/1.4795938
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发表时间：
2013-03
影响因子：
4
通讯作者：
N. Pertsev
中科院分区：
文献类型：
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作者：
N. Pertsev
本文从理论上描述了铁磁薄膜与单畴铁电衬底耦合时电场致90°畴壁运动所产生的逆磁电效应。为此，利用多畴异质结构中应力源的位错模型，计算了具有不同取向面内磁化的90°畴的体积分数作为面内应变的函数。结合铁电衬底在电场中的压电变形，这就产生了铁磁-铁电复合材料的磁电磁化率。值得注意的是，预测了Co40Fe60薄膜与Pb(Zn1/3Nb2/3)O3‐6%PbTiO3单晶耦合的杂化体的巨大磁电磁化率约为4 × 10−5 s/m。
The converse magnetoelectric effect resulting from the electric-field-induced motion of 90° domain walls in a ferromagnetic film coupled to a single-domain ferroelectric substrate is described theoretically. To that end, the volume fractions of 90° domains with differently oriented in-plane magnetizations are calculated as a function of in-plane strains using the dislocation modeling of stress sources in polydomain heterostructures. Being combined with piezoelectric deformations of a ferroelectric substrate in an electric field, this yields magnetoelectric susceptibilities of ferromagnetic-ferroelectric composites. Remarkably, a giant magnetoelectric susceptibility about 4 × 10−5 s/m is predicted for hybrids comprising Co40Fe60 films coupled to the Pb(Zn1/3Nb2/3)O3‐6%PbTiO3 single crystal.