Abstract We studied electric field modification of magnetic properties in a Pt/Co/AlOx trilayer via magneto-optical Kerr microscopy. We observed the spontaneous formation of labyrinthine magnetic domain structure due to thermally activated domain nucleation and propagation under zero applied magnetic field. A variation of the period of the labyrinthine structure under electric field is observed as well as saturation magnetization and magnetic anisotropy variations. Using an analytical formula of the stripe equilibrium width we estimate the variation of the interfacial Dzyaloshinskii-Moriya interaction under electric field as function of the exchange stiffness constant.

中文翻译：

---

Pt/Co/AlOx 薄膜中界面 Dzyaloshinskii-Moriya 相互作用的电场控制

摘要 我们通过磁光克尔显微镜研究了 Pt/Co/AlOx 三层中磁性的电场改性。我们观察到由于在零外加磁场下热激活畴成核和传播而自发形成迷宫式磁畴结构。观察到在电场作用下迷宫结构周期的变化以及饱和磁化强度和磁各向异性的变化。使用条纹平衡宽度的分析公式，我们估计了电场下界面 Dzyaloshinskii-Moriya 相互作用的变化，作为交换刚度常数的函数。