Temperature oscillations of magnetization observed in nanofluid ferromagnetic graphite

TL;DR

This study reports unique temperature-dependent magnetization behaviors in nanofluid ferromagnetic graphite, including low-temperature anomalies and oscillations above 50K, linked to finite size effects and particle correlations.

Contribution

It reveals novel temperature oscillations in magnetization of nanofluid ferromagnetic graphite, attributed to particle interactions and finite size effects, expanding understanding of magnetic properties at the nanoscale.

Findings

Magnetization shows low-temperature anomalies.

Pronounced temperature oscillations observed above 50K.

Oscillations linked to particle pair correlations.

Abstract

We report on unusual magnetic properties observed in the nanofluid room-temperature ferromagnetic graphite (with an average particle size of l=10nm). More precisely, the measured magnetization exhibits a low-temperature anomaly (attributed to manifestation of finite size effects below the quantum temperature) as well as pronounced temperature oscillations above T=50K (attributed to manifestation of the hard-sphere type pair correlations between ferromagnetic particles in the nanofluid).