On the applicability of non-resonant artificial diamagnetics

TL;DR

This paper investigates whether complex artificial diamagnetic structures offer advantages over simple conductors for magnetic levitation, concluding that internal structuring does not improve performance for small bodies.

Contribution

The study provides a theoretical analysis showing that for electrically small objects, artificial diamagnetics do not outperform simple conductors in magnetic levitation applications.

Findings

Internal structuring worsens the figure of merit for small bodies.

Artificial diamagnetics do not surpass simple conductors in external magnetic field behavior.

Complex structures offer no benefit over simple conductors for the considered application.

Abstract

Artificial diamagnetics are prominent for achieving extraordinarily strong diamagnetism in a wide frequency range. However, as far as the magnetic fields outside the artificial medium are concerned, bulk conductors show a very similar pattern. The question arises whether the complicated internal structure of artificial diamagnetics can, to this end, be replaced by a simpler object. We analyse the figure of merit for the application of diamagnetics in magnetic levitation, and show that for an electrically small body, any internal structuring makes the figure of merit worse than that of a simple conducting object.