Polar domain walls trigger magnetoelectric coupling.
Polar domain walls trigger magnetoelectric coupling.
复制标题
极性域壁触发磁电耦合。
DOI：
10.1038/srep13784
复制
发表时间：
2015-09-21
影响因子：
4.6
通讯作者：
Salje EK
中科院分区：
文献类型：
--
作者：
Fontcuberta J;Skumryev V;Laukhin V;Granados X;Salje EK
氧化物异质结构中的界面物理是材料科学中的关键问题。铁性系统中的磁畴壁是自然产生的界面的例子，其中相邻磁畴的有序参数被改变，并且可能产生新的性质。在这里，我们发现，电调谐钛酸锶中的铁弹磁畴壁，会导致外延夹持在钛酸锶衬底上的相邻磁性层(La1/2Sr1/2MnO3)的磁畴结构发生显著变化。我们发现，磁性层的性质与SrTiO_3孪晶边界上可以电调制的极化区的存在密切相关。这些发现表明，通过利用DWS纳米区域对外部刺激的响应性，即使在没有任何区域贡献的情况下，也可以获得相邻层的显著和可调节的宏观反应。我们的结论是，已知存在于其他材料中的极性DWS可以用来触发可调响应，并可能导致操纵界面新出现的性质的新方法。
Interface physics in oxides heterostructures is pivotal in material’s science. Domain walls (DWs) in ferroic systems are examples of naturally occurring interfaces, where order parameter of neighboring domains is modified and emerging properties may develop. Here we show that electric tuning of ferroelastic domain walls in SrTiO3 leads to dramatic changes of the magnetic domain structure of a neighboring magnetic layer (La1/2Sr1/2MnO3) epitaxially clamped on a SrTiO3 substrate. We show that the properties of the magnetic layer are intimately connected to the existence of polar regions at twin boundaries of SrTiO3, developing at , that can be electrically modulated. These findings illustrate that by exploiting the responsiveness of DWs nanoregions to external stimuli, even in absence of any domain contribution, prominent and adjustable macroscopic reactions of neighboring layers can be obtained. We conclude that polar DWs, known to exist in other materials, can be used to trigger tunable responses and may lead to new ways for the manipulation of interfacial emerging properties.