Magneto-optical properties and photoluminescence of (PrDy)(FeCo)B microwires

Microwires (PrDy)(FeCo)B, which do not contain iron inclusions and nuclei, were obtained by extraction from a melt drop (PrDy)(FeCo)B at a reduced cooling rate. Inclusions of crystal phases (PrDy)$_{2}$(CoFe)$_{14}$B, and magnetic Laves phase Dy(FeCo)$_{2}$ were identified in the volume of microwires and luminescent under the action of ultraviolet radiation (UV) inclusions of the phases Pr$_{2}$O$_{3}$ and Dy$_{2}$O$_{3}$. The distributions of the transverse and longitudinal components of magnetization along the micro-conductor were obtained, which was recorded for different directions of the external magnetic field using a magneto-optical indicator film and the magneto-optical Kerr effect. In microwires with a width of less than 70 $\mu$m, the longitudinal external field causes a modulation of the transverse magnetization corresponding to the formation of cylindrical domains. The coexistence of longitudinal and radial magnetization was detected by changing the angle of incidence and wavelength of the Kerr microscope. No surface radial domains were found in wider microwires with a width of $\sim$ 150 $\mu$m. Ultraviolet-stimulated photoluminescence of inclusions of Pr$_{2}$O$_{3}$ and Dy$_{2}$O$_{3}$ oxides was detected.