Abstract
In this study, we investigated the electronic and magnetic properties of pure and Cr-doped \(Li_{2}O\) semiconductor within the framework of density functional theory (DFT) with the Korringa-Kohn-Rostoker method combined with the coherent potential approximation (KKR-CPA). The pure \(Li_{2}O\) compound proved to be an intrinsic semiconductor with an indirect band gap of 4.74 eV. However, Cr-doped \(Li_{2}O\) (\(Li_{2}O_{1-x}Cr_{x})\) showed the characteristics of a metal with a spin polarization at the Fermi level less than 100%. \(Li_{2}O_{1-x}Cr_{x}\) exhibits a ferromagnetic stable phase originating from strong hybridization existing between the d-orbitals of Cr and that of Oxygen and total magnetic moments ranging from −0.383 \(\mu _{B}\) to −0.912 \(\mu _{B}\) for a concentration in the interval between 10% and 25%, respectively. The formation energy was also been calculated to study the stability of the pure and doped compound. Finally, the value of the Curie temperature, which reaches 780 (K), exceeds the ambient temperature, revealing the potential use of this doped material for new spintronic devices.
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Acknowledgements
The authors would like to acknowledge the “Académie Hassan II des Sciences et Techniques”-Morocco for its financial support. The authors also thank the LPHE-MS, Faculty of Sciences, Mohammed V University in Rabat, Morocco for the technical support through computer facilities, where all the calculations have been performed.
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Mediane, N., Goumrhar, F., Drissi, L.B. et al. High Curie Temperatures and Ferromagnetism Formation in Cr-substituted Oxide Lithium Compound. J Supercond Nov Magn 35, 463–471 (2022). https://doi.org/10.1007/s10948-021-06071-x
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DOI: https://doi.org/10.1007/s10948-021-06071-x