Anomalous Hall Effect of Reentrant Spin Glass System Fe1-xAlx (x ~ 0.3)

TL;DR

This study investigates the anomalous Hall effect in the reentrant spin glass system Fe0.7Al0.3, revealing temperature-dependent anomalies at the spin-glass transition and discussing potential chirality mechanisms involved.

Contribution

It provides experimental evidence of anomalous Hall coefficient behavior at the spin-glass transition in Fe-Al alloys, highlighting the role of chirality mechanisms.

Findings

Rs shows anomalous temperature dependence at T_G

Additional term in Hall effect appears with spin glass phase onset

Discussion supports chirality mechanism in Hall effect

Abstract

The anomalous Hall coefficient Rs has been studied for the reentrant spin glass system Fe0.7Al0.3 by measuring the magnetization M and the Hall resistivity r_H. We have found that R_s exhibits anomalous temperature dependence at the spin-glass transition temperature T_G, indicating that an additional term appears along with the beginning of the spin glass phase. The result is discussed in relation to the recent proposal of the chirality mechanism of the Hall effect in the spin glass phase.