论文标题
超导诱导的磁各向异性的变化与自旋轨道相互作用
Superconductivity-induced change in magnetic anisotropy in epitaxial ferromagnet-superconductor hybrids with spin-orbit interaction
论文作者
论文摘要
在薄膜超导体/超导剂/铁磁异质结构中，超导性与铁磁性之间的相互作用通常是由F层的磁态设置的S层超导性的变化反映的。在这里，我们报告了相反的效果：单个Fe（001）层的磁晶各向异性的转化，因此其首选磁化方向是由基础V层通过自旋轨道偶联MGO界面的超导性驱动的。我们将其归因于由受控生成的三胞胎库珀对产生的铁磁体的自由能的附加贡献，该生成取决于铁磁铁和自旋轨道场的交换场之间的相对角度。这与Meissner筛选或域壁 - 涡流相互作用的常见观察到的磁域修饰的根本不同，并提供了使用超导性从根本上调整磁各向异性的能力 - 设计未来的低温磁性记忆的关键步骤。
The interaction between superconductivity and ferromagnetism in thin film superconductor/ferromagnet heterostructures is usually reflected by a change in superconductivity of the S layer set by the magnetic state of the F layers. Here we report the converse effect: transformation of the magnetocrystalline anisotropy of a single Fe(001) layer, and thus its preferred magnetization orientation, driven by the superconductivity of an underlying V layer through a spin-orbit coupled MgO interface. We attribute this to an additional contribution to the free energy of the ferromagnet arising from the controlled generation of triplet Cooper pairs, which depends on the relative angle between the exchange field of the ferromagnet and the spin-orbit field. This is fundamentally different from the commonly observed magnetic domain modification by Meissner screening or domain wall-vortex interaction and offers the ability to fundamentally tune magnetic anisotropies using superconductivity - a key step in designing future cryogenic magnetic memories.
