Effect of annealing on magnetic and magnetotransport properties of Ga1-xMnxAs epilayers

TL;DR

This study investigates how annealing affects the magnetic, magnetotransport, and structural properties of Ga1-xMnxAs epilayers, revealing significant changes in magnetoresistivity, magnetization, and strain.

Contribution

It provides new insights into the effects of annealing conditions on the magnetic and structural properties of Ga1-xMnxAs epilayers.

Findings

Annealing causes significant changes in magnetoresistivity curves.

Magnetization is notably affected by annealing.

Strain in the epilayers is altered through annealing.

Abstract

High-field magnetic measurements performed with the use of magnetooptical Kerr effect (MOKE) in the polar configuration as well as high-field and low-field magnetotransport studies were carried out on Ga1-xMnxAs epilayers grown by low temperature molecular beam epitaxy, and subsequently annealed under various conditions. The structural investigations by means of high resolution XRD were also performed. We observe significant changes in magnetoresistivity curves, magnetization and strain introduced by the annealing.