论文标题
非共线抗Fiferromagnet中的成像拓扑缺陷
Imaging topological defects in a non-collinear antiferromagnet
论文作者
论文摘要
我们报告了从散装Bifeo $ _3 $晶体表面的环形抗铁磁序列出现的拓扑缺陷的形成。我们首先在一个单一的铁电域中观察到相互和真实空间的磁成像技术，抗铁磁域的共存，其中抗磁性循环沿不同的波形传播。然后，我们证明这些波频的方向并未严格锁定到首选的晶体学轴，因为连续旋转桥梁不同的波形。在磁域之间的连接处，我们观察到拓扑线缺陷与在具有旋转对称性的各种层状物理系统中发现的拓扑线缺陷。我们的工作确定了这些磁性物体在室温下的存在，在多效反铁磁铁Bifeo $ _3 $中，为它们用于旋转的新可能性提供了新的可能性。
We report on the formation of topological defects emerging from the cycloidal antiferromagnetic order at the surface of bulk BiFeO$_3$ crystals. Combining reciprocal and real-space magnetic imaging techniques, we first observe, in a single ferroelectric domain, the coexistence of antiferromagnetic domains in which the antiferromagnetic cycloid propagates along different wavevectors. We then show that the direction of these wavevectors is not strictly locked to the preferred crystallographic axes as continuous rotations bridge different wavevectors. At the junctions between the magnetic domains, we observe topological line defects identical to those found in a broad variety of lamellar physical systems with rotational symmetries. Our work establishes the presence of these magnetic objects at room temperature in the multiferroic antiferromagnet BiFeO$_3$, offering new possibilities for their use in spintronics.
