Abstract
New class of microwires based on rare-earth PrDyFeCoB alloy is developed. Chemical technique of the microwire tip designing is proposed. The α-Fe core microwire covered with amorphous shell provides stepwise switching between four magnetic states in external homogeneous magnetic field. Focusing of the stray field in the microwire tip was visualized. Bias field ~20 Oe, high saturation magnetization and attraction force up to 2000 pN, large field gradient and techniques of chemical sharpening provide novelty and significance of the obtained results.
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