论文标题
néel-type skyrmion宿主中域壁磁力和磁电效应的宏观表现
Macroscopic Manifestation of Domain-wall Magnetism and Magnetoelectric Effect in a Néel-type Skyrmion Host
论文作者
论文摘要
我们报告了gav $ _4 $ se $ _8 $中的磁状态，它仅在具有中尺度极地域而不是极性单域晶体的样品中出现。它的发作伴随着磁化敏感性和磁性扭矩的尖锐异常，与在循环层之间的过渡，Néel-type Skyrmion Lattice和Ferromagnetic状态之间的过渡后，与其他异常不同。我们将这种额外的过渡归功于在结构域壁上定位的磁纹理的形成，在结构域壁上，磁相互作用逐步改变，并用不同的螺旋平面（由相邻域托管）旋转纹理，需要匹配。磁电流中明显的异常表明，域壁构造的磁态也对磁电响应有很大的贡献。我们期望极性域壁通常具有这种限制的磁边状态，尤其是在具有较长波长磁性的材料中。
We report a magnetic state in GaV$_4$Se$_8$ which emerges exclusively in samples with mesoscale polar domains and not in polar mono-domain crystals. Its onset is accompanied with a sharp anomaly in the magnetic susceptibility and the magnetic torque, distinct from other anomalies observed also in polar mono-domain samples upon transitions between the cycloidal, the Néel-type skyrmion lattice and the ferromagnetic states. We ascribe this additional transition to the formation of magnetic textures localized at structural domain walls, where the magnetic interactions change stepwise and spin textures with different spiral planes, hosted by neighbouring domains, need to be matched. A clear anomaly in the magneto-current indicates that the domain-wall-confined magnetic states also have strong contributions to the magnetoelectric response. We expect polar domain walls to commonly host such confined magnetic edge states, especially in materials with long wavelength magnetic order.
