Hydrostatic pressure influence on T C in (Ga,Mn)As

The influence of hydrostatic pressure on the Curie temperature T-C of thin ferromagnetic (Ga,Mn)As layers is studied. New experimental data unambiguously point to both positive and negative pressure-induced changes of Curie temperature. The positive pressure coefficient is observed for samples with...

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Bibliographic Details
Published in:Physical review. B 2020-02, Vol.101 (5), p.1, Article 054413
Main Authors: Gryglas-Borysiewicz, Marta, Kwiatkowski, Adam, Juszyński, Piotr, Ogorzałek, Zuzanna, Puźniak, Konrad, Tokarczyk, Mateusz, Kowalski, Grzegorz, Baj, Michał, Wasik, Dariusz, Gonzalez Szwacki, Nevill, Przybytek, Jacek, Sadowski, Janusz, Sawicki, Maciej, Dziawa, Piotr, Domagala, Jaroslaw Z.
Format: Article
Language:English
Subjects:
Fysik
Physics
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Summary:The influence of hydrostatic pressure on the Curie temperature T-C of thin ferromagnetic (Ga,Mn)As layers is studied. New experimental data unambiguously point to both positive and negative pressure-induced changes of Curie temperature. The positive pressure coefficient is observed for samples with relatively high values of T-C and can be quantitatively described by the p-d Zener model of carrier-mediated ferromagnetism within the six-band k . p formalism and the ab initio approach. First-principles calculations of structural, electronic, and magnetic properties of (Ga,Mn)As show that antiferromagnetic coupling of substitutional Mn atoms with interstitial ones may account for a decrease of T-C under pressure in samples having a substantial concentration of interstitial Mn.
ISSN:2469-9950
2469-9969
2469-9969
DOI:10.1103/PhysRevB.101.054413