Changing the magnetic and optical properties of (Ga, Fe)N and (Ga, Co)N by alloying with oxygen

被引：0
|
作者：
K. El Maalam
E. Salmani
O. Mounkachi
M. Hamedoun
A. Benyoussef
机构：
[1] MAScIR Foundation,Materials_Nanomaterials Center
[2] Mohammed V University,Magnetism and Physics of the High Energies Laboratory, Faculty of Sciences
[3] Hassan II Academy of Science and Technology,undefined
来源：
Applied Physics A | 2016年 / 122卷
关键词：
Ferromagnetic State; Coherent Potential Approximation; Systematic Density Functional Theory; Ferromagnetic Stability; Coherent Potential Approximation Method;
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摘要：
Systematic density functional theory studies and model analyses have been used to show that the magnetic properties of (Ga0.94Fe0.06)N and (Ga0.94Co0.06)N can be changed from disorder local moment state to ferromagnetic state by replacing ~2 % of the nitrogen atoms with oxygen atoms. The estimated curie temperatures are much higher than the room temperature which indicates the room temperature ferromagnetism can be realized by oxygen doping. Moreover, the optical absorption spectra obtained by ab initio calculations confirm the ferromagnetic stability based on the charge state of magnetic impurities. (Ga0.94Fe0.06)N0.98O0.02 and (Ga0.94Co0.06)N0.98O0.02 ferromagnetic DMS exhibits half-metallic behavior, which is suitable for spintronics applications.
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