AI 中文总结
研究在无杂散场交替磁体中实现可逆自旋分裂切换的方法，基于非极性双亚晶格磁体中自旋诱导的非本征极化，以DyFeO3为例证明该机制，确立此为非极性体系统可切换交替磁性的途径。
AI 中文摘要
在无杂散场的交替磁体中实现可逆自旋分裂切换在自旋电子学应用中很有前景，但目前仅限于一类狭窄的极性材料。我们提出了一种基于非极性双亚晶格磁体中自旋诱导的非本征极化的更广泛方法。我们在DyFeO3中证明了这种机制，其中非极性Fe和Dy自旋模式的乘积作为诱导极性模式发生转变。密度泛函理论表明，Dy-Fe相对自旋排列选择极化，而Fe亚晶格控制非相对论性自旋分裂，从而实现可逆切换。这些结果确立了自旋诱导的非本征极化作为在非极性体系统中实现可切换交替磁性的途径。
英文摘要
Enabling reversible spin-splitting switching in stray-field-free altermagnets is promising for spintronic applications, but currently limited to a narrow class of polar materials. We propose a broader approach based on spin-induced improper polarization in nonpolar dual-sublattice magnets. We demonstrate this mechanism in DyFeO3, where the product of nonpolar Fe and Dy spin modes transforms as an induced polar mode. Density functional theory shows that the relative Dy--Fe spin alignment selects the polarization, while the Fe sublattice controls nonrelativistic spin splitting, thus enabling reversible switching. These results establish spin-induced improper polarization as a route to switchable altermagnetism in nonpolar bulk systems.
