Quantum oscillations of the Stoner susceptibility: theory

TL;DR

This paper predicts oscillatory behavior in the Stoner susceptibility of materials near magnetic instability, leading to alternating paramagnetic and ferromagnetic phases under varying magnetic fields, with potential experimental observation and applications.

Contribution

It introduces a theoretical prediction of oscillations in Stoner susceptibility, extending understanding of magnetic phase transitions under strong magnetic fields.

Findings

Oscillations in Stoner susceptibility can induce phase changes.

Proposed experimental setup for observing these oscillations.

Potential to control quantum critical systems near their critical point.

Abstract

Oscillatory effects in magnetic susceptibility of free electrons in a strong magnetic field is well known phenomenon and is well captured by Lifshitz-Kosevich formula. In this paper we point out similar oscillatory effects in Stoner susceptibility which makes the system to oscillate between paramagnetic phase and ferromagnetic phase alternatively as a function of external magnetic field strength. This effect can happen in a material which is tuned near to its magnetic instability. We suggest an experimental set-up to observe this effect. We also suggest that our result can be exploited to control a quantum critical system around its quantum critical point to study its thermodynamical or transport properties.