Incorporation of iron on the clean and gallium-bilayer GaN(0001) surface

被引:6
|
作者
Gonzalez-Hernandez, Rafael [1 ]
Lopez, William [1 ]
Moreno-Armenta, Maria G. [2 ]
Arbey Rodriguez, Jairo [3 ]
机构
[1] Univ Norte, GFMC, Dept Fis, Barranquilla 1569, Colombia
[2] UNAM, Ctr Nanociencias & Nanotecnol, Ensenada 22800, Baja California, Mexico
[3] Univ Nacl Colombia, GEMA, Dept Fis, Bogota 5997, Colombia
关键词
GENERALIZED GRADIENT APPROXIMATION; FE THIN-FILMS; EPITAXIAL-GROWTH; WURTZITE GAN(0001); GAN;
D O I
10.1063/1.3536788
中图分类号
O59 [应用物理学];
学科分类号
摘要
First-principles calculations of the energetic and magnetic properties of Fe incorporation in various sites on clean and Ga-bilayer GaN(0001) surfaces are presented. Employing a thermodynamic approach, the calculated formation energies demonstrate characteristic features in the structural stability and magnetism of Fe incorporated surfaces depending on the growth condition. It is found that the N-rich conditions produce greater magnetization compared to the Ga-rich condition. N-rich magnetization is attributed to the interface formation of FeN layers on the GaN(0001) surface. In addition, calculations for Fe incorporation in Ga-bilayer terminated surface suggest that it is possible to form a FeGax ferromagnetic alloy by performing the growth under extreme Ga-rich conditions. (C) 2011 American Institute of Physics. [doi:10.1063/1.3536788]
引用
收藏
页数:3
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