论文标题
应变调节Bloch和Néel-type磁性天际：相位场模拟
Strain-tuning Bloch- and Néel-type magnetic skyrmions: a phase-field simulation
论文作者
论文摘要
磁性域的应变操纵（例如条带域和天空）引起了人们的关注，因为它在磁逻辑和记忆设备上的潜在应用。在这里，利用相位模型，我们通过使用单轴菌株来证明方向域和天空的确定性调制。条纹结构域的重新定位可能是由合适的应变引起的，重新定向域的方向取决于施加的单轴应变的方向以及包括Bloch-和Néel-类型的域壁的类型。此外，通过构建相图，我们发现，当单轴拉伸应变增加时，铁磁岛会经历从天空到多域或单个域的连续相变。磁各向异性能量与杂散场能之间的竞争导致连续的相变和单轴拉伸应变下域模式的形成。我们的研究为应变控制的磁性域设计提供了理论基础。
Strain manipulation of the magnetic domains, such as the stripe domains and skyrmions, has attracted considerable attention because of its potential applications for magnetic logic and memory devices. Here, utilizing phase-field modeling, we demonstrate the deterministic modulation of the orientation and the configuration of the stripe domains and skyrmions by using a uniaxial strain. The reorientation of the stripe domains can be caused by a suitable strain, and the direction of the reorientated domains is determined by the direction of the applied uniaxial strain and the type of domain walls, including Bloch- and Néel- types. Furthermore, by constructing a phase diagram, we discovered that when the uniaxial tensile strain increases, the ferromagnetic islands undergo a continuous phase transition from a skyrmion to multi-domains or a single domain. The competition between magnetic anisotropy energy and stray field energy leads to the continuous phase transition and the formation of domain patterns under the uniaxial tensile strain. Our research provides a theoretical foundation for the development of strain-controlled magnetic domain designs.
