Magnetoresistive Effect and Magnetic Paraneters of Nanocrystalline Thin-film Alloys Based on Co, Fe and Cu

The paper presents the results of studies of the magnetoresistance effect and magnetic parameters of three-component film alloys based on the ferromagnetic alloy $\mathrm{Fe}_{\mathrm{x}}\mathrm{Co}1-\mathrm{x}$ and Cu with a thickness of 20-50 nm and at a concentration of cobalt atoms of $10\leq c\mathrm{c}_{0}\leq 90$ aT.%. It is shown that for film alloys $\mathrm{Fe}_{\mathrm{x}}\mathrm{C}_{01-\mathrm{x}}$ in the entire range of studied concentrations and thicknesses at room temperature, the anisotropic nature of magnetoresistance is recorded, while for films $(\mathrm{Fe}_{\mathrm{x}}\mathrm{C}_{01-\mathrm{x}})_{0.5}\mathrm{C}_{\mathrm{u}0.5}$ at $x\gt 0.6$ the magnetoresistance has an isotropic character. The dependences of the values of the coercive force BC and the saturation field BS on the content of Fe x atoms for film alloys $\mathrm{Fe}_{\mathrm{x}}\mathrm{Co}1-\mathrm{x}/\mathrm{S}$ $Ta (\mathrm{Fe}_{\mathrm{x}}\mathrm{c}_{01-\mathrm{x}})_{0.5}\mathrm{C}_{\mathrm{u0.5}}/\mathrm{S}$ with a thickness of 30 nm are analyzed.