Structural and magnetic properties of Fe1+dTe single crystals

TL;DR

This study investigates how varying excess Fe in Fe1+dTe single crystals affects their structural and magnetic properties, revealing controllable magnetism linked to Fe concentration.

Contribution

It provides new insights into the relationship between excess Fe content and magnetic behavior in Fe1+dTe crystals.

Findings

Magnetization increases with excess Fe concentration.

Antiferromagnetic transition broadens for dnom > 1.15.

Antiferromagnetic transition temperature decreases with specific Fe excess.

Abstract

We have grown single crystals of Fe1+dTe by a conventional self-flux method. We obtained plate-like single crystals with dnom \geq 0.1. The value of the magnetization increased with increasing excess Fe concentration, and a broadening of the antiferromagnetic transition was observed for dnom >1.15. Further, we noted that the antiferromagnetic transition of Fe1.134Te (dnom = 0.15) was clearly suppressed to a lower temperature, which would indicate a possibility of controllability of magnetism by excess Fe concentration.