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Field induced vortex dynamics in magnetic Ni nanotriangles

机译:磁性镍纳米三角形中的场致涡旋动力学

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The magnetization states in Ni triangular dots under an applied magnetic field have been studied using variable-field magnetic force microscopy (VF-MFM) imaging. In order to understand their dynamics we performed micromagnetic simulations which are in remarkable agreement with the experimental MFM results. The nanostructures present magnetic vortices as ground states which move under an external magnetic field. The combination of micromagnetic simulations and MFM imaging allows us to identify correctly the vortex chiralities and polarizations. The triangular geometry produces an improved contrast of the vortex core. Additionally, the vortices of different chiralities present clearly different MFM images under an applied field.
机译:已经使用可变场磁力显微镜(VF-MFM)成像研究了施加磁场下Ni三角点中的磁化状态。为了了解它们的动力学,我们进行了微磁模拟,这与MFM实验结果十分吻合。纳米结构呈现出作为基态的磁涡流,它们在外部磁场下移动。微磁模拟和MFM成像的结合使我们能够正确识别涡旋手性和极化。三角形的几何形状可改善涡旋芯的对比度。此外,在应用场下,不同手性的旋涡呈现出明显不同的MFM图像。

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