Magnetism in (Ga,Mn)As Thin Films With TC Up To 173K
K.Y. Wang, R.P. Campion, K.W. Edmonds, M. Sawicki, T. Dietl, C.T., Foxon, and B.L. Gallagher
TL;DR
This paper studies the magnetic properties of (Ga,Mn)As thin films, achieving transition temperatures up to 173K, and compares experimental results with theoretical predictions, suggesting no fundamental limit to ferromagnetic transition temperature.
Contribution
It provides experimental data on high-temperature ferromagnetism in (Ga,Mn)As films and compares these results with Zener mean-field theory, challenging previous assumptions about limits to TC.
Findings
Ferromagnetic transition temperature up to 173K
No evidence of a fundamental limit to TC
Comparison with Zener mean-field theory
Abstract
We have investigated the magnetic properties of (Ga,Mn)As thin films with Mn concentration between 1 and 9%. Ferromagnetic transition temperatures TC of up to 173K are observed. The results are compared to the predictions of the Zener mean-field theory. We find no evidence of a fundamental limit to TC.
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