Mechanically Stimulated Domain Re-arrangement in Cryogenic Magnetic Shielding Materials

TL;DR

This paper investigates how small mechanical stimulations at cryogenic temperatures significantly alter the magnetic permeability of shielding materials, revealing reversible changes that impact their effectiveness.

Contribution

It provides the first detailed measurements of mechanical effects on cryogenic magnetic shielding materials' permeability.

Findings

Mechanical stimulation causes large, reversible changes in permeability.

Permeability varies significantly with mechanical perturbation.

Results inform better design of cryogenic magnetic shields.

Abstract

Room temperature properties and behavior of several types of cryogenic magnetic shielding materials are measured and reported here. Large changes in the effective relative permeability are observed when the materials are perturbed with a relatively small mechanical stimulation. The change in permeability is a reversible effect.