In this work, we investigate the linear relationship between domain wall creep parameters, and evaluate the effect of material parameters on magnetic domain wall creep in a series of Pt/Co/Pt multilayers with perpendicular magnetic anisotropy. The results for the samples with different magnetic layer thicknesses verify the linear relationship between the domain wall creep parameters, which is because in these samples both domain wall creep parameters are mainly affected by Co layer thickness and both of the domain wall creep parameters are proportional to the Co layer thickness. With the assistance of surface acoustic waves, the domain wall creep parameters also follow the linear relationship. This suggests a relationship between the anisotropy density K and local pinning strength fpin:fpin∝K18. The above linear relationship does not exist in annealed samples because annealing breaks the relationship between the local pinning strength and material parameters.

中文翻译：

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Co/Pt多层膜畴壁蠕变参数线性关系研究

在这项工作中，我们研究了畴壁蠕变参数之间的线性关系，并评估了材料参数对一系列具有垂直磁各向异性的 Pt/Co/Pt 多层膜中磁畴壁蠕变的影响。不同磁层厚度样品的结果验证了畴壁蠕变参数之间的线性关系，这是因为在这些样品中，两个畴壁蠕变参数主要受Co层厚度的影响，并且两个畴壁蠕变参数都与Co层厚度。在表面声波的辅助下，畴壁蠕变参数也遵循线性关系。这表明各向异性密度之间的关系钾和局部钉扎强度 Fp我n:Fp我n∝钾1个8个. 上述线性关系在退火样品中不存在，因为退火破坏了局部钉扎强度与材料参数之间的关系。