Magnetic Omniconversion: Source-Independent Molding of Magnetostatic Fields

TL;DR

This paper introduces a versatile, passive method for transforming magnetic fields from arbitrary sources into desired configurations within source-free regions, using linear magnetic materials, enabling advanced control in various applications.

Contribution

The authors present a general, source-independent framework for magnetic field shaping that combines analytical, numerical, and experimental validation, expanding capabilities in magnetic field manipulation.

Findings

Successful demonstration of magnetic field shaping using linear magnetic materials

Analytical and numerical models confirm the feasibility of source-independent molding

Experimental validation supports practical implementation of the proposed method

Abstract

Magnetic fields are constrained by the geometry and location of their sources, limiting the ability to freely tailor their spatial distribution. We introduce a general framework to passively convert the magnetic field generated by arbitrary sources into any prescribed desired field within a finite source-free region. Our method relies on field shaping using linear magnetic materials, enabling source-independent magnetic-field molding. We provide the general recipe, analytical and numerical demonstrations for some paradigmatic examples, and a proof-of-concept experiment that validates the idea and materials implementation. This approach enables novel possibilities in magnetic shielding, targeted field delivery, advanced imaging technologies, and a broad range of field-control applications.