Understanding stripe domains in Permalloy films via the angular dependence of permeability spectra

作者：Wei, Jinwu; Feng, Hongmei; Zhu, Zengtai; Song, Chengkun; Wang, Xiangqian; Liu, Qingfang; Wang, Jianbo^*

来源：Journal of Magnetism and Magnetic Materials, 2017, 432: 245-249.

DOI：10.1016/j.jmmm.2016.12.147

• Stripe domains
• Permeability spectra
• Permalloy film

An investigation of the angular dependence of the dynamic permeability spectra has been performed. Three Permalloy films with different thickness were used as the study samples that possess the stripe domains. In order to better understand the magnetization distribution in stripe domains, a theoretical approach was proposed to analyze the variation of the resonance intensity of permeability spectra. By fitting the angular dependence of the mu"(max) using a theoretical function, a coefficient K that can be used to evaluate the average value of the periodic function of the anting angle theta in a periodic stripe is obtained. As the film thickness increases, the decrease of the ratio between domain wall width and stripe domain width is happen. This enables that the coefficient K decreases with the increase of film thickness. By deducing this coefficient K, one can estimate the maximum canting angle theta(0) similar to 8 degrees for the Permalloy films in our experiments.

• 出版日期2017-6-15
• 单位兰州大学