Focused magnetization in sharpened rare-earth microwires with four switchable magnetic states

摘要

New class of microwires based on rare-earth PrDyFeCoB alloy is developed. Chemical technique of the microwire tip designing is proposed. The alpha-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 similar to 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. (C) 2020 Elsevier B.V. All rights reserved.