Design of an Externally Driven Current Cloak

TL;DR

This paper introduces a tunable current cloak that can be switched on or off using an external magnetic field, demonstrated analytically and via simulations in a magneto-resistive system with a stainless steel inclusion.

Contribution

It presents the novel concept of an externally controllable current cloak, enabling dynamic manipulation of electrical invisibility in conductive materials.

Findings

A current cloak can be constructed using a magneto-resistive matrix.

External magnetic fields can switch the cloak on and off.

Finite Element Simulations confirm the analytical results.

Abstract

An inhomogeneity into a conductive matrix deforms the flow pattern of an applied electric current. A usual current cloak can be defined as a permanent modification of the matrix properties around the inhomogeneity guaranteeing that the current flow pattern is similar before and after passing by the modified zone, so it implies the "electrical invisibility" of the inhomogeneous region. Here we introduce the concept of a current cloak that can be tuned --switched on and off, for example-- by means on an external field. We demonstrate analytically and using Finite Elements Simulations that a current cloak can be constructed and manipulated by an external magnetic field for a concrete system consisting in a magneto-resistive matrix with a stainless steel inclusion.