Interface stabilized skyrmions in oxide structures for skyrmionics

用于斯格明子的氧化物结构中的界面稳定斯格明子

• 批准号: 403503315
• 负责人: Professor Dr. Stefan Blügel
• 金额: --
• 依托单位: PGI-1 / IAS-1: Quanten-Theorie der Materialien
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/403503315?language=en
• 关键词: Interface; stabilized; skyrmions; oxide; structures

Chiral magnets are an exciting class of topological matter harboring localized and topologically protected vortex-like magnetic textures called skyrmions, which are currently under intense scrutiny as an entity for information storage and processing. The main focus of the community so-far was and is on metallic bulk, film and thin-film systems. In this proposal, we focus on the oxidation and oxides at interfaces with metals and all-oxide interfaces for skyrmionics. Oxide interfaces offer a new perspective due to their response to electric fields, low ohmic losses and magnetic damping, thickness dependence, variety of interface symmetry, tunability due to oxidization and prospective anisotropic Dzyaloshinskii-Moriya interaction providing the perspective of coexistence of skyrmions and antiskyrmions, and open a natural route for skyrmions in antiferro- and frustrated non-coplanar magnets. Using a three-pronged scale-bridging approach combining density functional calculations with a generalized spin-lattice model containing the Heisenberg and the Dzyaloshinskii-Moriya interaction as well as the magnetic anisotropy and the dipolar interaction, with micromagnetism, we explore materials combinations for interfaces that offer great potentials for hosting skyrmions, investigate their phase diagram, stability and dynamics, their size as a function of external magnetic and electric fields and temperature. We study optimal parameters for manipulating the skyrmions size for memristive purpose.

手性磁体是一类令人兴奋的拓扑物质，具有局部和拓扑保护的涡旋状磁性纹理，称为skyrmions，目前正受到严格的审查，作为信息存储和处理的实体。到目前为止，该社区的主要重点是金属块体，薄膜和薄膜系统。在这个建议中，我们专注于氧化和氧化物与金属和全氧化物界面skyrmionics界面。氧化物界面提供了一个新的视角，由于它们对电场的响应，低欧姆损耗和磁阻尼，厚度依赖性，各种界面对称性，由于氧化和前瞻性各向异性Dzyaloshinskiii-Moriya相互作用的可调谐性，提供了共存的skyrmions和antiskyrmions的前景，并打开一个自然的路线skyrmions在反铁和沮丧的非共面磁体。使用三管齐下的尺度桥接方法，将密度泛函计算与包含海森堡和Dzyaloshinskiii-Moriya相互作用以及磁各向异性和偶极相互作用的广义自旋晶格模型结合起来，与微磁学，我们探索了为承载skyrmions提供巨大潜力的界面的材料组合，研究了它们的相图，稳定性和动力学，它们的尺寸是外部磁场、电场和温度的函数。我们研究的最佳参数操纵的skyrmions的大小忆阻的目的。