Enhancement of the anomalous Hall effect and spin glass behavior in the bilayered manganite La(2-2x)Sr(1+2x)Mn2O7

TL;DR

This study investigates the enhancement of the anomalous Hall effect and the emergence of spin glass behavior in a bilayered manganite, revealing temperature-dependent changes in Hall resistivity linked to magnetic inhomogeneity.

Contribution

It provides new insights into the relationship between Hall resistivity and spin glass states in bilayered manganites, highlighting microscopic inhomogeneity effects.

Findings

Increase in Hall coefficients below 50K

Evidence of spin glass state at low magnetic field

Intrinsic inhomogeneity influences magnetic behavior

Abstract

The Hall resistivity and magnetization have been investigated in the ferromagnetic state of the bilayered manganite La(2-2x)Sr(1+2x)Mn2O7 (x=0.36). The Hall resistivity shows an increase in both the ordinary and anomalous Hall coefficients at low temperatures below 50K, a region in which experimental evidence for the spin glass state has been found in a low magnetic field of 1mT. The origin of the anomalous behavior of the Hall resistivity relevant to magnetic states may lie in the intrinsic microscopic inhomogeneity in a quasi-two-dimensional electron system.