论文标题
有效的界面Dzyaloshinskii-Moriya相互作用和Skyrmion稳定在Ferromagnet/Paramagnet和Ferromagnet/Superpoductor Hybrid Systems中
Effective interfacial Dzyaloshinskii-Moriya interaction and skyrmion stabilization in ferromagnet/paramagnet and ferromagnet/superconductor hybrid systems
论文作者
论文摘要
结果表明，dzyaloshinskii-moriya相互作用（DMI）形式的术语有助于在磁磁性（PM）上（PM）（临界温度，TC）或超导（SC）底物在伦敦极限内发生的铁磁（PM）（PM）（PM高于临界温度，TC）或超导（SC）底物的自由能。这种贡献是由于膜和底物之间的磁相互作用引起的，底物在薄膜中通过其磁化不均匀性产生的磁场影响FM磁化。令人惊讶的是，在FM/PM系统中，该有效的DMI稳定了手性磁纹理，例如Neel型的磁性天空素（MSK），这与FM/SC中的一个相反。有效DMI的强度敏感性可以调整FM膜和PM或SC底物之间的耦合，从而在FM/PM中控制MSK半径。
It is shown that a term in the form of Dzyaloshinskii-Moriya interaction (DMI) contributes to the free energy of a ferromagnetic (FM) film on a paramagnetic (PM) (an FM above the critical temperature, Tc) or superconducting (SC) substrate occurring in the London limit. This contribution results from magnetostatic interaction between the film and substrate under which the substrate affects FM magnetization back via its magnetic field produced by magnetization inhomogeneity in the film. Strikingly, in the FM/PM system this effective DMI stabilizes chiral magnetic textures, e.g., magnetic skyrmions (MSk's) of the Neel-type, which is in contrast to that in the FM/SC one. A strong temperature sensitivity of the effective DMI allows for tuning the coupling between the FM film and PM or SC substrate and thus controlling the MSk radius in FM/PM.
