Lateral electric-field control of giant magnetoresistance in Co/Cu/Fe/BaTiO3 multiferroic heterostructure
Lateral electric-field control of giant magnetoresistance in Co/Cu/Fe/BaTiO3 multiferroic heterostructure
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DOI：
10.1063/1.4929339
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发表时间：
2015-08
影响因子：
4
通讯作者：
S. S. Pillai-S.;H. Kojima;M. Itoh;T. Taniyama
中科院分区：
文献类型：
--
作者：
S. S. Pillai-S.;H. Kojima;M. Itoh;T. Taniyama
我们报道了侧向电场驱动下BaTiO3单晶上Co/Cu/Fe三层线的磁电阻发生了相当大的变化。当电场为66 kV/cm时，BaTiO3的正方相变化很小，而正方和菱形相变化超过40%。我们将其归因于可能的电场诱导的自旋相关电子结构的变化，即通过BaTiO3的界面应变传递Fe的自旋极化。讨论了BaTiO3不同相的对比结果，并结合了各相铁电极化开关过程的不同方面。
We report lateral electric-field-driven sizable changes in the magnetoresistance of Co/Cu/Fe tri-layered wires on BaTiO3 single crystal. While the observed change is marginal in the tetragonal phase of BaTiO3, it reaches over 40% in the orthorhombic and rhombohedral phases with an electric field of 66 kV/cm. We attribute it to possible electric-field-induced variations of the spin-dependent electronic structures, i.e., spin polarization, of the Fe via interfacial strain transfer from BaTiO3. The contrasting results for the different phases of BaTiO3 are discussed, associated with the distinct aspects of the ferroelectric polarization switching processes in each phase.