Ferromagnetic behavior in magnetized plasmas

TL;DR

This paper investigates how electron spin effects in a low-temperature plasma can induce ferromagnetic behavior and lead to potential instabilities under specific high-density conditions.

Contribution

It introduces a novel MHD fluid model that incorporates electron spin, quantum dispersion, and degeneracy effects to explain ferromagnetic phenomena in plasmas.

Findings

Electron spin can induce ferromagnetic behavior in plasmas.

High-density regimes can lead to plasma instability due to spin effects.

Conditions for ferromagnetism and instability are identified.

Abstract

We consider a low-temperature plasma within a newly developed MHD Fluid model. In addition to the standard terms, the electron spin, quantum particle dispersion and degeneracy effects are included. It turns out that the electron spin properties can give rise to Ferromagnetic behavior in certain regimes. If additional conditions are fulfilled, a homogenous magnetized plasma can even be unstable. This happen in the low-temperature high-density regime, when the magnetic properties associated with the spin can overcome the stabilizing effects of the thermal and Fermi pressure, to cause a Jeans like instability.