Alternate bright and dark stripe like domain patterns are exhibited by materials having perpendicular magnetic anisotropy (generally observed in thick films). Is there any other reason for occurrence of such stripe domains?
The perpendicular anisotropy orients the magnetization normal to the film plane. Therefore, dipolar effects are significant. The demagnetizing field is H_d=-N M where N is the demagnetizing factor which is N=1 for the perpendicular orientation (and N=0 if the magnetization is in the plane). The width of the stripe domains is controlled by the interplay between exchange and dipolar interaction.
I thank you both for your answers. In my films, which are weakly ferromagnetic at room temperature, I have observed such stripe like domains. The length of these domains is in tens of microns. I have read that the stripe extend when domain propagation energy is higher than domain nucleation energy. Can you help in understanding this?? I have MFM patterns and the respective MH of the samples. Is it possible to conclude anything from these data? currently I don't have access to any other measurements.
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