论文标题
在组成 - 均匀的中心对称磁性单层中，强大的散装Dzyaloshinskii-Moriya相互作用
Strong bulk Dzyaloshinskii-Moriya interaction in composition-uniform centrosymmetric magnetic single layers
论文作者
论文摘要
Dzyaloshinskii-Moriya相互作用（DMI）是基于这种现象的手性旋转现象和新兴技术的关键成分。非零DMI通常发生在磁界面或非中心对称单晶体中。在这里，我们报告了在中心对称多晶铁磁铁中观察到的强大意外DMI，该晶体既不具有晶体反转对称性破坏也不是组成梯度。该DMI是一种批量效应，随着磁层的厚度而增加，并且对接口或相邻材料的对称性不敏感。我们观察到总的DMI强度大于文献中最高的界面DMI的倍数。该DMI很可能是由强的自旋轨道耦合，强轨道杂交以及材料中“隐藏”的长距离不对称性引起的。我们发现在中心对称，成分 - 均匀的磁性单层中，强大的非常规的散装DMI为新兴的旋转型领域提供了基本的构建块，并将刺激多种材料中非常规的旋转孔现象的开发。
Dzyaloshinskii-Moriya interaction (DMI) is the key ingredient of chiral spintronic phenomena and the emerging technologies based on such phenomena. A nonzero DMI usually occurs at magnetic interfaces or within non-centrosymmetric single crystals. Here, we report the observation of a strong unexpected DMI within a centrosymmetric polycrystalline ferromagnet that has neither a crystal inversion symmetry breaking nor a composition gradient. This DMI is a bulk effect, increases with the thickness of the magnetic layer, and is insensitive to the symmetry of the interfaces or the neighboring materials. We observe a total DMI strength that is a factor of >2 greater than the highest interfacial DMI in the literature. This DMI most likely arises from the strong spin-orbit coupling, strong orbital hybridization, and a "hidden" long-range asymmetry in the material. Our discovery of the strong unconventional bulk DMI in centrosymmetric, composition-uniform magnetic single layers provide fundamental building blocks for the emerging field of spintronics and will stimulate the exploitation of unconventional spin-orbit phenomena in a wide range of materials.
