Magnetic Structure of Mn-doped 6H-SiC

Euro-TMCS I: Theory, Modelling and Computational Methods for Semiconductors

物理学;计算机科学

Azri, M. Al^1 ; Elzain, M.^1 ; Bouziane, K.^2 ; Chérif, S.M.^3

Department of Physics, College of Science, Sultan Qaboos University, Oman^1

Pôle Energies Renouvelables Environnement et Etudes Pétrolières, Université Internationale de Rabat, Morocco^2

LSPM (CNRS-UPR 3407), Université Paris 13, France^3

关键词: Ab initio calculations;    Antiferro-magnetically coupled;    Interstitial sites;    Local magnetic properties;    Mn atoms;    Mn concentrations;    Mn-doped;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/609/1/012007/pdf
DOI  :  10.1088/1742-6596/609/1/012007

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

We investigated the local magnetic properties of Mn-doped 6H-SiC using ab-initio calculations. The calculation addresses various configurations of Mn single impurity and Mn dimers at substitutional/interstitial sites with and without neighboring Si and C vacancies. The calculations showed that a substitutional Mn atom at either Si or C sites possesses a magnetic moment. The Mn atom at Si site possesses larger magnetic moment than Mn atom at C site. Our calculations show that antiferromagnetically coupled pair of Mn atoms at Si sites with neighboring C vacancy is magnetically more stable. The calculation also showed that the interstitial sites with C neighbors are more favorable than those with Si and the magnetic moment for Mn at interstitial sites is less compared to that at substitutional sites. The results are used to understand the experimental data obtained on Mn- 6H-SiC for various Mn concentrations.