科研之友
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摘要
The nonplanar sample surface is a crucial feature that must be taken into account for a good interpretation of magneto-optical observations of magnetic cylindrical microwires. This is due to the fact that a curved topography gives rise to a spatial distribution of local planes of incidence as a function of position on the circumference of a cylinder. Analytical calculations of the magnetic contrast of magnetic cylinders spontaneously magnetized in the axial direction reveal that an axial magnetization reversal produces a characteristic black-and-white magneto-optical contrast and that it does not correspond to two oppositely magnetized domains, as would be concluded in the case of planar samples. Optical and magneto-optical observations of thin cylindrical FeSiB wires support this model. Calculations are also performed for the cases of circular and polar magnetizations.
- 出版日期2017-8-17
